2. In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. a. What percent of their offspring will be yellow? b. What percent of their offspring will be black? c What percent of their offspring will be tortoise shell? d. Why is it impossible to have a tortoise shell male offspring?

2. In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. a. What percent of their offspring will be yellow? b. What percent of their offspring will be black? c What percent of their offspring will be tortoise shell? d. Why is it impossible to have a tortoise shell male offspring?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section12.2: Later Modifications And Additions To Mendel’s Principles

Problem 2SB: A true-breeding rabbit with agouti (mottled, grayish brown) fur crossed with a true-breeding rabbit...

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1. Two normal visioned parents have a color-blind son. Give the genotype of both parents and the son. 2. In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. a. What percent of their offspring will be yellow? b. What percent of their offspring will be black? c. What percent of their offspring will be tortoise shell? d. Why is it impossible to have a tortoise shell male offspring?
2. In cats, the allele (B) produces black color but (b) produces a yellow color. These alleles are incompletely dominant to each other. A heterozygote produces a tortoise shell color. The alleles (B) and (b) are sex-linked as well. Cross a tortoise shell female with a yellow male. What percent of their offspring will be yellow? a. b. What percent of their offspring will be black? c. What percent of their offspring will be tortoise shell? d. Why is it impossible to have a tortoise shell male offspring?
1. In rabbits, mono-colored fur (F) and straight ears (E) are dominant over spotted-fur and floppy ears. Your son owns a rabbit possessing white fur and floppy ears, and he mated it with another rabbit. The offspring of the rabbits turn out to be 8 in total. 4 are possessing white fur with straight ears, while the remaining 4 has spotted white and brown fur with straight ears. a. What are the traits (phenotype) present on the other rabbit mated to your son’s rabbit? Create a table to properly note the phenotypes and genotypes. Considering that your son continued breeding his rabbit to the original rabbit, what will be the probability that it will produce: b. male white fur with straight eared rabbit c. 2 male white fur with floppy eared rabbit d. 2 male white furred, straight eared rabbits and 4 female spotted white and brown, straight eared rabbits
1. Chinchillas are small, furry South American rodents. They were originally brought to the United States from Chile in 1918 and raised for their fur, and have become increasingly popular as cage pets. They come in a variety of colors, but the most common is gray. In chinchillas, gray fur is dominant to violet. If one parent is gray HETEROZYGOUS, and the other is violet, what is the probability in their offspring of: being homozygous dominant? ________% being heterozygous? ________% being homozygous recessive? ________% having violet fur? ________% 2. Trixie, a former cheerleader, just had a child. She isn't sure who the father is. Carrie is blood type A and the baby is type AB. Use your knowledge of genetics to help Trixie, and indicate whether each of the following men COULD be the father. If he could be the father, put down Yes. If not, just say No, which is perhaps what Trixie should have done. #9, the quarterback, who is type A homozygous ______ #10, the…
8. In certain breeds of dogs, two different sets of alleles determine the color pattern. Black color is dominant and red color is recessive; solid color is dominant and white spotting is recessive. A homozygous black-and-white spotted male is crossed with a red-and-white spotted female. What is the probability of their producing a solid black puppy? Show your work.
4. The ruffed chicken has an under-chin wattle. A smooth wattle (S) is dominant over a wrinkled wattle (s). A red wattle (HR) is incompletely dominant with a white wattle (HW) so that an individual with HRHW will have a pink wattle. A chicken with a wrinkled red wattle is mated to a homozygous chicken with a smooth white wattle. What is the genotype and phenotype of the chicks?
2. In cats, yellow coat color is due to a gene, b, and black coat color is due to its allele, B. The alleles b and B are sex-linked (i.e. are located on the X chromosome). Because of Barr body formation, the heterozygous condition results in tortoise shell colored cats (both black and yellow patches). a) What kinds of offspring would be expected from the mating of a black male with a yellow female? b) Of a yellow male with a tortoise female?
4. In hogs a gene that produces a white belt (B) around the animal's body is dominant over the allele for a uniformly colored body (b). An allele on a different gene produces fusion of the two hooves on each foot and this allele (F) is dominant over the allele for normal/non-fused hooves (f). Assume that a uniformly colored, normal footed hog is mated to a hog that is homozygous for the belted character and fused hooves. What is the phenotypic ratio for the F1 generation? a. Assume the F1 individuals were allowed to breed freely among themselves. Show the Punnett square for the cross between F1 individuals. b. с. Write the phenotypic ratio for the F2 generation.
26. In sheep, eye color is controlled by a single gene with two alleles. When a homozygous brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue-eyed offspring are produced. If the blue-eyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes? (A) 0% (B) 25% (С) 50% (D) 75% (E) 100% 27. In peas the trait for tall plants is dominant (T) and the trait for short plants is recessive (t). The trait for yellow seed color is dominant (Y) and the trait for green seed color is recessive (y). A cross between two plants results in 296 tall yellow plants and 104 tall green plants. Which of the following are most likely to be the genotypes of the parents? (A) TTYY x TTYY (В) ТТуу х TТYу (C) TtYy x TtYy (D) TtYy x TTYY (E) TtYY x Ttyy 28. In humans, red-green color blindness is a sexlinked recessive trait. If a man and a woman produce a color-blind son, which of the following must be true? (A) The father is color-blind. (B) Both parents…
26. In sheep, eye color is controlled by a single gene with two alleles. When a homozygous brown-eyed sheep is crossed with a homozygous green-eyed sheep, blue-eyed offspring are produced. If the blue-eyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes? (A) 0% (B) 25% (C) 50% (D) 75% (E) 100% 27. In peas the trait for tall plants is dominant (T) and the trait for short plants is recessive (t). The trait for yellow seed color is dominant (Y) and the trait for green seed color is recessive (y). A cross between two plants results in 296 tall yellow plants and 104 tall green plants. Which of the following are most likely to be the genotypes of the parents? (A) TTYY x TTYY (в) TТуу х ТTYу (C) TtYy x TIYY (D) TtYy x TTYY (E) TIYY x Ttyy 28. In humans, red-green color blindness is a sexlinked recessive trait. If a man and a woman produce a color-blind son, which of the following must be true? (A) The father is color-blind. (B) Both parents…
5. a. Black coat color in Cocker Spaniels is governed by a dominant allele (B) and red coat color (b) by a recessive allele. Solid pattern (S) is governed by the dominant allele of a different gene and spotted pattern (s) is recessive. A solid black male is mated with a solid red female which produces a litter of 6 pups- 2 solid black, 2 solid red, one black and white (spotted) and one red and white (spotted). Determine the genotypes of the parents. Show your work and/or explain your logic. b. A dominant gene A causes yellow color in rats. The dominant allele of another gene, R, produces black coat color. When the two dominants occur together (A_R_), they interact to produce grey. Rats with the genotype aarr are cream-colored. If a grey male and a yellow female are mated and produce 3 grey, 3 yellow, 1 cream and 1 black offspring, Determine the genotypes of the parents. Show your work and/or explain your logic. C. One gene for coat color in cats is sex-linked (X chromosome). The…
8. In gerbils, the gene that specifies coat color is sex-linked and has multiple alleles, as follows: B-black, br - brown, by - yellow, and b - albino. The allele br is incompletely dominant over by, the combination br by giving tan color; otherwise, dominance is in the order given -- B, br, by, b. (For your information, gerbils are mammals.) A black gerbil mated with a yellow gerbil gave one brown male and one black female offspring. a. What is the sex of the black parent? b. What is the genotype of the brown offspring? c. If the two offspring were to mate with each other, what is the probability that they will have a yellow offspring? d. If the two offspring were to mate with each other, what is the probability that the first three female offspring will be black? e. If the brown offspring were to mate with his mother, what is the probability that the first two offspring will be brown males?