Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with wild-type females, or (iii) both (i.e. reciprocal crosses), to produce an F1 generation that will enable you to determine if the traits are dominant or recessive, and if they are sex-linked (on the X chromosome). Draw mating diagrams and Punnett squares to support your answer.
Q: In the fruit fly, vestigial wings and hairy body are produced by two recessive genes located on…
A: note: since you have posted multiple questions we have answered the first questions for you. if you…
Q: Two genes control color in corn snakes as follows:O– B– snakes are brown, O– bb are orange, oo B–…
A: A gene is the physical and functional unit of heredity. They pass information from one generation to…
Q: Assuming no crossover takes place, how many copies of the short-hair allele (h) will be present in…
A: Dominant allele Dominant allele is the factor (term use by Mendel, now it is known as gene) which…
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: In pigs, let’s assume that a straight tail (T) is dominant to a curly tail (t). Let us also assume…
A: According to the Mendelian inheritance each gene has two alleles that determines the phenotype of an…
Q: A female of genotype a b c + + + produces 100 meiotic tetrads. Of these, 68 show no crossover…
A: A four-part structure that forms during the prophase of meiosis and consists of two homologous…
Q: Mules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes,…
A: Meiosis is the process through which gametes are formed. It includes a reduction in the number of…
Q: Let’s suppose that a gene affecting pigmentation is found on the Xchromosome (in mammals or insects)…
A: Introduction The total chromosomes in the body are divided into two groups: Autosomes…
Q: A cross in Drosophila melanogaster involved the recessive X-linked genes for white eye (w), yellow…
A: In Drosophila melanogaster , there as three types of genes : A ) White eye ( w ) B ) Yellow body (…
Q: When Calvin Bridges observed a large number of offspring from a cross of white-eyed female…
A: Failure in the segregation of daughter chromosomes during the gametogenesis in meiosis-I and…
Q: Chromosomal nondisjunction of the X chromosome in female gametes of humans means that live offspring…
A: Nondisjunction of X chromosomes during meiosis I will result in four abnormal gametes. Two gametes…
Q: Bar (B) is a dominant sex-linked mutant of D. melanogaster. Held-out wings and ebony body are…
A: Bar eye character (B) is a sex dominant character.
Q: Cinnabar eye color is a sex-linked, recessive characteristic in fruit flies. If a female having…
A: Cinnabar eye is an X-linked recessive characteristic in fruit flies. In general, X-linked…
Q: Butterflies have an X-Y sex-determination system that is different from that of flies or humans.…
A: -The butterfly shown has a completely unique pattern of colors because o a special trait- it has two…
Q: You have been given a virgin Drosophila female. You notice that the bristles on her thorax are much…
A:
Q: Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with…
A: Since you have asked multiple questions, we will solve the first question for you. If you want any…
Q: Suppose you discover two interesting rare cytological abnormalities in the karyotype of a human…
A: To find: To find the proportion that has the same karyotype using the given pair of chromosomes
Q: Thorn apples produce either purple (P) or white (p) flowers, and their fruits are either spiny (S)…
A: Purple (P) flowers = dominant White (p) flowers= recessive Spiny (S) = dominant Smooth (s)=…
Q: Mules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes,…
A: When the female horse is mated with the male donkey, produces a mule having 63 chromosomes. The…
Q: Which, if any, of the following sex-chromosome aneuploids in humans are fertile: XXX, XXY, XYY, XO?
A: Aneuploids are a kind of chromosomal mutations which results in abnormal number of chromosomes.
Q: A cross between two pure breeding pea plants in which one parent produced yellow seeds and the other…
A: Punnet square is the diagrammatical square that helps to determine all resultant combinations of…
Q: You are studying the inheritance pattern of hair color in troll dolls, which have XY sex…
A: Given: In troll doll, XY determination is present. Crossed a true-breeding blue-haired male with a…
Q: Chromosomal nondisjunction of the X chromosome in female gametes of humans means that live offspring…
A: Nondisjunction of X chromosomes during meiosis I will result in four abnormal gametes. Two gametes…
Q: In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in -…
A: Introduction: The process by which a kid inherits genetic information from a parent is known as…
Q: The mutant genes for vestigial wings and singed bristles are approximately 30 map units apart on…
A: Each gene has two alleles, one is a dominant allele and another is a recessive allele. If the mutant…
Q: Suppose gene B is X-linked and is embryonically lethal when homozygous or hemizygous recessive. A…
A: Let us first discuss the terms used in the question, Homozygous:- A condition when two copies of an…
Q: Show via a diagram how the product(s) of a meiotic (either I or II) nondisjunction involving the X…
A: Kilnefelter's Syndrome: Klinefelter's syndrome is a genetic disorder in which a boy is born with an…
Q: If the G locus were 50 or more map units from the centromere, what types and proportions of gametes…
A: Introduction Recombination:- It is a process by which pieces of DNA are broken and recombined to…
Q: Recall that red color (R) in four-o’clock flowers is incompletely dominant over white (R ′). In the…
A: Genetics is the branch of biology which deals with genes, heredity, and genome in the organism.…
Q: In fruit flies, eye color is carried on the X chromosome. The allele for red eyes is dominant over…
A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…
Q: Assuming a pure-breeding P generation, what ratio would you expect in the F2 generation if a mutant…
A: The alleles are the alternative forms of a gene that are located on the same locus of a homologous…
Q: In humans, the mic2 gene (involved in antibody production) is found on sex chromosomes and has…
A: The pseudoautosomal inheritance is observed for the allele in the identical regions of X and Y…
Q: Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With…
A: Male has two types of chromosomes are X and Y whereas females have two chromosomes both are X and…
Q: Imagine a cross between a man and a woman having the following genotypes: Genotype of the…
A: Dominant allele In genetics, it refers to the situation of one allele masking the affect of other…
Q: In some goats, the presence of horns is produced by an autosomal gene that is dominant in males and…
A: Genetics is the branch of biology which deals with genes, heredity, and genome in the organism.…
Q: When two genes are located on the same chromosome,what is the physical basis for the production of…
A: Genetics is the branch of biology that deals with inheritance and variation. A gene is a section of…
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: The initial step is to decide the request for the three genes.This should be possible by assessing…
Q: A female with the genotype RRMM is crossed with a male with the genotype rrmm. Which of the…
A: Female genotype - RRMM Female gametes - RM Male genotype - rrmm Male gamete - rm Cross - RRMM x…
Q: If two gene pairs A and a and B and b are assorting independently with A dominant to a and B…
A: To find: To find the probability of the given two gene pairs
Q: Which of the following statements are true regarding the F2 offspring of a mapping cross for three…
A: A three-point cross is a cross done between the 3 genes to confirm the order and distance between…
Q: In Drosophila, sepia colored eyes are due to a recessive allele s and red eyes are due to a dominant…
A: The study of heredity and variation is called genetics. The basic principles of genetics were…
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: Inheritance or heredity is passing-on one trait from the parents to the progeny by either asexual or…
Q: Cinnabar eyes is a sex-linked, recessive characteristic in fruit flies. If a female having cinnabar…
A: In fruit flies, cinnabar eyes is a sex-linked recessive characteristic that occurs due to mutation…
Q: In the Dorset sheep breed, both males and females have horns, and the trait is controlled by an…
A: According to our guideline we can answer only the first question. The alleles are the alternative…
Q: A husband and wife have typical vision, although both of their fathers are red-green colorblind (an…
A: X-linked red-colour blindness is a recessive trait. Females heterozygous for this trait have normal…
Q: In fruit flies, Cinnabar eyes are encoded by a recessive allele located on the X chromosome. If a…
A: An allele may be defined as different forms of the same gene. The dominant allele is the one that…
Q: Diagram the types of gametes you would expect from a ++/yw female, given no crossovers, one…
A: A homologous chromosome is a chromosome that contains one pair of chromosomes with the same gene…
Q: Mules result from a cross between a horse (2 n = 64) and a donkey (2 n = 62), have 63 chromosomes,…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: What would be the chromosome number of progeny resulting from the following crosses in wheat? What…
A: The complete chromosome sets present in the cells of an organism is referred to as ploidy. Humans…
Q: The following X-linked recessive traits are found in fruit flies:vermilion eyes are recessive to red…
A: To calculate The map distance separating two genes
Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with wild-type females, or (iii) both (i.e. reciprocal crosses), to produce an F1 generation that will enable you to determine if the traits are dominant or recessive, and if they are sex-linked (on the X chromosome). Draw mating diagrams and Punnett squares to support your answer.
Step by step
Solved in 3 steps
- Human sex chromosomes are XX for females and XY for males. a. With respect to an X-linked gene, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele? c. If a female is heterozygous for an X-linked allele, how many different types of gametes can she produce with respect to this allele?Indicate whether to cross (i) mutant females with wild-type males, or (ii) mutant males with wild-type females, or (iii) both (i.e. reciprocal crosses), to produce an F1 generation that will enable you to determine if the traits are dominant or recessive, and if they are sex-linked (on the X chromosome). Draw mating diagrams and Punnett squares to support your answer. To determine whether the mutant genes are independent or linked, a testcross is more appropriate than using data from the F2 generation. Knowing which are the recessive genes, indicate which individuals you would mate in this testcross. Draw a mating diagram & use the forked line method to predict the outcome of this cross. Conduct the appropriate testcross using Drosophila Lab, record your results and indicate whether the three mutant genes are inherited independently or whether they are linked? Include a chi square analysis to support your conclusion.Fruit flies can have straight wings (S) or curly wings (s), and they can have be female XX or male XY. (A) For a standard monohybrid cross (Ss ´ Ss), what proportion of the offspring will have the genotype ss? (Express the proportion as a simple fraction) (B) For the following cross (SsXX ´ SsXY), what proportion of the offspring will have the genotype Ss? (Express the proportion as a simple fraction) (C) What proportion will have the genotype XX? (Express the proportion as a simple fraction) (D) What proportion will have the genotype SsXX? (Express the proportion as a simple fraction)SHOW YOUR WORK
- Two plants in a cross were each heterozygous for two gene pairs (AB /ab) whose loci are linked and 30 map units (mu) apart. (Recall that 1 mu is equal to 1% recombination between two genes.) Assuming that crossing over occurs during the formation of both male and female gametes and that the A and B alleles are dominant, determine the phenotypic ratio of their offspring. Part E: What proportion of the offspring of two plants (both (AB/ab ) will be A - B- if the genes are 30 mu apart? Part F: What proportion of the offspring of two plants (both (AB/ab)) will be A - bb if the genes are 30 mu apart? Part G: What proportion of the offspring of two plants (both (AB/ab)) will be aaB- If the genes are 30 mu apart? Part H: What proportion of the offspring of two plants (both (AB/ab)) will be aabb if the genes are 30 mu apart?A woman with a balanced reciprocal translocation of Chromosomes 4 and 20 (karyotype, right panel below) is trying to reproduce with a man of normal karyotype (left panel below). Please answer: 1) What are the karyotypes of their respective gametes ()? 2) What are the karyotypes of their potential offspring ()? 3) What are the percentages of each karyotype (gametes and offspring) ()? 4) Indicate which karyotype (of the offspring) will be lethal, carrier or normal (). 5) Do she have reduced fertility and why?n corn, male sterility is controlled by maternal cytoplasmic elements. This phenotype renders the male part of the corn plants (i.e the tassel) unable to produce fertile pollen; the female parts, however, remain receptive to pollination by pollen from male fertile corn plants. However, the presence of a nuclear fertility restorer gene F restores fertility to male sterile lines sing the cardboard chips, simulate the crosses indicated below. Give the genotypes and phenotypes of the offsprings in each cross, and properly label the nucleus and the cytoplasm of each individual in the cross Legend male sterile cytoplasm Male fertile cytoplasm FF nucleus Ff nucleus ff nucleus A. Male sterile female x FF male Explain the phenotype of the offspring B. Male sterile female x Ff male Explain the phenotype of the offspring
- A fruit fly with a gray body and red eyes (genotype BbPp) is mated with a fly having a black and purple eyes (genotype bbpp). Show diagrammatically a genetic cross between the two flies and the possible genotypes and phenotypes of F1. What ratio of offspring would you expect if the body-colour and eye-colour genes are on different chromosome (unlinked)? When mating is actually carried out, most of the offspring look like the parents, but 3% have a gray body and purple eyes, and 3% have a black body and red eyes. Compare and discuss the observation with your answer in part (Bar (B) is a dominant sex-linked mutant of D. melanogaster. Held-out wings and ebony body are recessive, autosomal mutants on chromosome III, mapping 12 map units apart. A Bar-eyed, ebony-bodied male was crossed to a held-out female, and the resulting F1 progeny WERE INBRED to produce the F2. At what frequency do you expect wild-type flies from this cross? (Reminder: Crossing over does not occur in the male). Based on the information in Problem 3, how often would you get a bar ebony but not held-out progeny?Three genes yellow (y) white (w) and cut (ct) are under investigation for possible linkage on the X chromosome. Pure breeding yellow body/white eye/normal wing female flies are crossed with pure breeding black body/red eye/cut wing males. The females in the F1 are black/red/normal, the males are all yellow/white/normal.The F2 males and females are crossed, but ONLY the male flies are are scored (see table). Phenotype Male offspring y + ct 9 + w + 6 y w ct 90 + + + 95 + + ct 424 y w + 376 A. Is the gene order as written (y-w-ct) the same as the gene order on the chromosome? B.What is the mapping distance between yellow and white? C.What is the between cut and white? D.What is the mapping distance between yellow and cut?
- A fruit fly with a gray body and red eyes (genotype BbPp) is mated with a fly having a black and purple eyes (genotype bbpp). a) Show diagrammatically a genetic cross between the two flies and the possible genotypes and phenotypes of F1. What ratio of offspring would you expect if the body-colour and eye-colour genes are on different chromosome (unlinked)? b) When mating is actually carried out, most of the offspring look like the parents, but 3% have a gray body and purple eyes, and 3% have a black body and red eyes. Compare and discuss the observation with your answer in part (a).A yellow female is crossed with a gray male. The F1 are intercrossed to produce the F2. Give the genotypes and phenotypes, along with the expected proportions, of the F1 and F2 progeny.Both the domestic Muscovy duck and the domestic duck (Anas platyrhynchos domesticus) both have a diploid number of 80 chromosomes (2n=80). These two different genera of ducks can mate and produce a mulard. The mulards are bred because of their high meat production. As seen in many interspecific F1 hybrids, mulards are sterile. a. What is the expected chromosome number in the somatic cells of the mulard? b. Explain why the mulard is sterile?