3. In cats, the gene for calico (multicolored) cats is codominant. Females that receive a B or R gene have black and orange splotches on white coats. Males can only be black or orange, but never calico. Here's what a calico female's genotype would look like XB XR. Show the cross of a female black cat, with a male orange cat a) What percentage of the kittens will be calico and female? b) What color will all the male cats be?
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- In cats, the genotype AA produces tabby fur color; Aa is also a tabby, and aa is black. Another gene at a different locus is epistatic to the gene for fur color. When present in its dominant W form (WW or Ww), this gene blocks the formation of fur color and all the offspring are white; ww individuals develop normal fur color. What fur colors, and in what proportions, would you expect from the cross AaWw Aa Ww?5.In guinea pigs, rough coats (with lots of swirly cowlicks) are dominant over smooth coats. If an RR guinea pig is crossed with a Rr guinea pig, what are the possible genotypes and phenotypes of the offspring? What are the chances of each? Fill in the table: Genotype Phenotype Chance1. In pea plants, yellow color (Y) is dominant over green color (y). A yellow-colored pea plant is crossed with a green-colored pea plant. Half of their offspring is yellow-colored while the other half is green-colored.What is the genotype of the yellow-colored parent? YY O Yy yy The genotype cannot be determined. 2. A scientist discovered an unknown organism in a tropical rainforest. The organism has been identified to possess the following characteristics: (1) multicellular at some point of its life cycle; (2) feeds on decaying organic matter; and (3) has a cell wall made of chitin.Which Kingdom does the unknown organism likely belong to? Kingdom Animalia Kingdom Plantae Kingdom Fungi Kingdom Protista 3. Which statement about ferns is TRUE? Ferns are unicellular organisms. Ferns are nonvascular plants. O Ferns have spores as reproductive structures. Ferns are capable of secondary growth.
- 1. If the allelic composition of a gene is Aa, the genotype is said to be (homozygous, heterozygous). What is the probability of having "a" allele in gametes? 2. For a genotype of AaBb, what are the possible allele compositions in gametes? 3. What are the possible genotypes and phenotypes ("A" phenotype or "a" phenotype) in the offspring of a monohybrid cross Aa x Aa? 4. If the organism display a dominant phenotype for a trait ("A" phenotype), how does one determine if the genotype is homozygous or heterozygous? Please use the Punnett square to explain. 5. How many possible genotypes are there in the offspring of a dihybrid cross AaBb x AaBb? What are the possible phenotypes for such a cross? What is the phenotypic ratio for AB : Ab : aB : ab? D Focus 72°F DEA F4 PrtScr Insert Hor F5 F6 F7 F8 F9 F10 F11 F12 24 & 3. 8 E R T Y U2. Cross a Brown and White Spotted Cow with a White Cow. What is the percentage of the genotype and phenotype of the offspring? What type of punnett square will you be using for this cross? Codomnent BB WW Parents: Genotypes: P1 x P2 Offspring: Genotype: Phenotype:1. In fruit flies, the phenotype for eye color is determined by a certain locus. E indicates the dominant allele and eindicates the recessive allele. The cross between a male wild-type fruit fly and a female white-eyed fruit flyproduced the following offspring.Wild-typeMaleWild-typeFemaleWhite-eyedMaleWhite-eyedFemaleBrown-eyedFemaleF1 0 45 55 0 1The wild-type and white-eyed individuals from the F1 generation were then crossed to produce the followingoffspring.F2 23 31 22 24 0(a) Determine the genotypes of the original parents (P generation) and explain your reasoning. You may usePunnett squares to enhance your description, but the results from the Punnett squares must be discussed inyour answer.(b) Use a Chi-squared test on the F2 generation data to analyze your prediction of the parental genotypes. Showall your work and explain the importance of your final answer.(c) The brown-eyed female in the F1 generation resulted from a mutational change. Explain what a mutation is,and discuss…
- 2. The presence of horns on Hereford cattle is controlled by a single gene. The hornless (H) condition is dominant over the horned (h) condition. A hornless cow was crossed repeatedly with the same horned bull. The following results were obtained in the F, offspring: 8 hornless cattle 7 horned cattle What are the parents' genotypes? cow bull2. In a strain of chickens, there are birds with white, black, or blue feathers. In crosses between ten white hens and ten blue roosters, there are 100 offspring: 24 hens with blue feathers, 26 roosters with blue feathers, 23 hens with white feathers, 27 roosters with white feathers. When crossing blue hens and white roosters, there are 100 offspring: 25 hens with blue feathers, 25 roosters with blue feathers, 26 hens with white feathers, 24 roosters with white feathers. A. Using allele symbols, create a plausible explanation for these traits. Why is this trait not sex-linked? When crossing ten black roosters and ten white hens, you observe 100 offspring: 51 hens with blue feathers, 49 roosters with blue feathers. When crossing white roosters and black hens, you observe 100 offspring: 50 hens with blue feathers, 50 roosters with blue feathers B. Use allele symbols to create a plausible explanation for these traits. C. Using evidence of all crosses, what would you predict if you…1. While hiking your find a wild growing pea plant with purple flowers. You know that purple pea flowers are dominant to white pea flowers, but from looking at the plant, you cannot be certain if it is homozygous dominant or heterozygous. Explain the cross you could set up to determine the genotype of the wild pea plant and which results would indicate it is heterozygous versus homozygous. 2. Using skin color as an example of a multifactorial trait, explain why skin color produces a wide range of possible phenotypes within the human population.
- 15. Human blood types is an example of a multiple allele system. Fill in the table below, showing what genotype(s) is/are associated with each phenotype. Use i = type O, IA = type A, IB = type B. Remember blood type is an example of codominance Blood Phenotype Genotype(s) (list all possibilities) AB4. Albinism is caused bya recessive al lele. A brown rabbit crossed with an albino rabbit produces 12 brown offspring. When the albino rabbit is crossed with a second brown rabbit, 7 brown and 5 albino offspring are produced. What is the best explanation for this genetic situation? Write the genotypes of each of the parents and their offspring. A First set of parents First set of offspring Cenng to ri Second set of parents e 1:s!! A A Second set of offspring Sbl4. Genetically, pure white dogs, when crossed to brown dogs produce an all white F1. Data on F2 progeny reveals: 136 white; 41 black; and 13 brown. This coat color trait in dogs is said to be exhibiting dominant epistasis following a 12: 3: 1 expected ratio. Test this hypothesis by chi square. Values of Chi Square dF .500 995 .oʻ393 990 975 .0³157 .0982 .0°393 .950 .900 .750 250 .100 .050 1 .0158 .102 .455 1.32 2.71 3.84 2 .0100 .0201 .0506 .103 .211 .575 1.39 2.77 4.61 5.99 .0717 .115 .216 .352 .584 1.21 2.37 4.11 6.25 7.81 4 .207 .297 .484 .711 1.06 1.92 3.36 5.39 7.78 9.49 5 .412 .554 .831 1.15 1.61 2.67 4.35 6.63 9.24 11.1