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?
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- 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) тТуу х ТTYу (C) TtYy x TIYY (D) TtYy x TTYY (Е) TIYY X Tiyy 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…(D) 1/6 (E) 1/64 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-cyed sheep are mated with each other, what percent of their offspring will most likely have brown eyes? (A) 0% (В) 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) Туу х ТТYу (C) TIYY x TIYy (D) TIYy 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)…
- 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…2 (a) The trait of hen- versus cock-feathering is a sex-limited trait controlled by a single gene. HH and Hh males always exhibit the hen-featuring trait. Only hh males show the cock-feathering trait. Starting with two heterozygous fowls that are hen- feathered, describe how you would obtain a true-breeding line that always produces cock-feathered males. [Ciri berhulu avam hatin1. In a cross between a black and a white guinea pig, all members of the F1 generation are black. The F2 generation is made up of approximately 3/4 black and 1/4 white guinea pigs. (a) Diagram this cross, showing the genotypes and phenotypes. (b) What will the offspring be like if two F2 white guinea pigs are mated?
- făctőrs suc 19) The genotype of a black snake is unknown. Black is a dominant allele, so the snake could be either BB or Bb. You cross this snake with a white snake (bb). Which of the following results of that cross would support the unknown genotype of the black snake being a homozygote? A) All F1 offspring are white B) All F1 offspring are black C) Half of the F1 offspring are white, the other half are black D) Three-quarters of the F1 offspring are black, the other quarter are white В x bb the7) In cats, the gene for coat color is both X-linked and incompletely dominant. There are black coat and yellow coat alleles, with calico (tortoise shell) as the heterozygous form. If a yellow male mates with a calico female, what are the expected offspring phenotypes (in percent)? hbit5. In cattle, roan color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. When two roan cattle are crossed, the phenotypes of the offspring are found to be in the ratio of 1 red: 2 roan: 1 white. a) What cross could produce the highest percentage of roan cattle? b) How would one produce a herd of pure-breeding roan-color cattle? Explain
- 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 rabbits9. In some cats, the gene for tail length shows incomplete dominance. When a cat with a long tail is bred to a cat with no tall, the resulting offspring have short talls. For each of the following, predict the types of offspring that would result. a) A long tail cat bred to a cat with no tail: Genotypes Phenotypes b) A long tail cat bred to a short tail cat: Genetypes Phenotypes c) Two shor tail cats: Genotypes Phenatypes3) In cats, black coat color (B) is dominant over gray (b). A female black cat whose mother is gray mates with a gray male. If this female has a litter of six kittens, what is the probability that four will be black? (Show your solution and put the final answer in a box).