In rural northeast Kansas domesticated cats are becoming wild, and biologists are observing that wildcats occur in three colors. Fur color is controlled by a single gene that exhibits incomplete dominance. A homozygous dominant cat is blue (BB), a homozygous recessive cat is red (bb), and a heterozygous wildcat will be purple (Bb). What would be the expected phenotypes of the offspring if a blue wildcat mates with a red wildcat? Develop a Punnett square and list the genotypes as well. 2) What is the probability that the following cross will produce an organism homozygous recessive for all 5 traits? AaBbCcDdEe × AaBbCcDdEe

In rural northeast Kansas domesticated cats are becoming wild, and biologists are observing that wildcats occur in three colors. Fur color is controlled by a single gene that exhibits incomplete dominance. A homozygous dominant cat is blue (BB), a homozygous recessive cat is red (bb), and a heterozygous wildcat will be purple (Bb). What would be the expected phenotypes of the offspring if a blue wildcat mates with a red wildcat? Develop a Punnett square and list the genotypes as well. 2) What is the probability that the following cross will produce an organism homozygous recessive for all 5 traits? AaBbCcDdEe × AaBbCcDdEe

Name: 1) In rural northeast Kansas domesticated cats are becoming wild, and
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Description: 1) In rural northeast Kansas domesticated cats are becoming wild, and biologists are observing that wildcats occur in three colors. Fur color is controlled by a single gene that exhibits incomplete dominance. A homozygous dominant cat is blue (BB), a

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 5CT: When you decide to breed your Labrador retriever Molly and sell the puppies, you discover that two...

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In rural northeast Kansas domesticated cats are becoming wild, and biologists are observing that wildcats occur in three colors. Fur color is controlled by a single gene that exhibits incomplete dominance. A homozygous dominant cat is blue (BB), a homozygous recessive cat is red (bb), and a heterozygous wildcat will be purple (Bb). What would be the expected phenotypes of the offspring if a blue wildcat mates with a red wildcat? Develop a Punnett square and list the genotypes as well.
3) Eye color in chimpanzees is coded for by one gene with two alleles, “A" and “a". “A" is dominant and codes for dark black eyes. “a" is recessive and codes for light brown eyes. If a black eyed chimpanzee (Parent A) has offspring with a light brown eyed chimpanzee (Parent B), and ½ of their offspring are black eyed and the other ½ are light brown eyed, then what are the two parent's genotypes? Parent A = Aa/AA Parent 3=aa A Aa %3D a a aa Aa aa Aa G aa a Phenotype Genotype Parent A Dark black eyes Parent B Light brown eyes aa 4) The previous question was a certain type of breeding experiment to determine the genotype of a dominant phenotype. This is an example of a
7) Skin color is a complex trait and while just a few genes account for the major difference between light and dark skin color, dozens of other genes participate. Assume in this hypothetical scenario there are only two genes for skin color, A and B. Each gene exhibits incomplete dominance. AABB (homozygous dominant for both genes) results in the darkest skin color and aabb (homozygous recessive for both genes) results in the lightest skin color. Tomas is heterozygous for both genes; his partner, Helga, is heterozygous for the A gene and homozygous recessive for the B gene. Construct a Punnett Square showing the cross of this couple. What are the expected genotypes and phenotypes of the children this couple could have?
Eye color in chimpanzees is coded for by one gene with two alleles, "A" and "a". “A" is dominant and codes for dark black eyes. "a" is recessive and codes for light brown eyes. If a black eyed chimpanzee (Parent A) has offspring with a light brown eyed chimpanzee (Parent B), and ½ of their offspring are black eyed and the other 2 are light brown eyed, then what is Parent A's genotype? AA Aa aa Aaa
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 hatin
1. Honeybee workers undergo a resistant behavioral pattern called hygienic behavior. Susceptible worker genotypes failed to remove the diseased larvae, so that the disease spread easily throughout the honeybee colony. a) When inbred lines of resistant genotypes were crossed with inbred lines of susceptible genotypes, the F1 worker bees showed unhygienic behavior.Is hygienic behavior dominant or recessive in these bees? Why?
1.) A long neck yellow giraffe (T t Y y) mates with a tall neck orange giraffe (T t y y). What is the percent chance their offspring would be have a short neck and orange? 2.) In humans, cataracts in the eyes and fragility of the bones are caused by dominant alleles that assort independently. A man with cataracts and normal bones marries a woman without cataracts but with fragile bones. The man’s father had normal eyes, and the woman’s father had normal bones a.) What are the genotypes of the man and the woman? b.) What is the probability that their first child will? (1) be free of both abnormalities (2) have cataracts but not have fragile bones (3) have fragile bones but not have cataracts (4) have both cataracts and fragile bones 3.) In corn plants, two pairs of genes control color in the ears of corn. The following genotypes result in various…
The color of spaniel dogs is controlled by a couple of alleles : B (dominant) leads to black hair [B], b to a tawny color [T]. In second independent gene, the dominant S allele gives a uniform colored fur [U] and the recessive s allele to a speckled coat [S]. A pure lineage uniformly black male is mated to a tawny speckled female. Among F2 animals, a uniformly black dog is crossed with a tawny speckled bitch. The progeny gives 1/4 [BU], 1/4 [TU], 1/4 [SB], 1/4 [ST]. How is this type of cross called and what is its goal? What are the genotypes of their parents?
5) Because of extensive inbreeding, pure-bred dogs are afflicted with many genetic disorders. Most of these disorders are recessive. For example, deafness is a recessive genetic disorder affecting many breeds of dogs, especially Dalmations. Two hearing Dalmations when bred together produced 12 hearting puppies and 4 deaf puppies. What are the genotypes of all the dogs? Parents’ genotype(s)? Hearing puppies’ genotypes (multiple answers)? Deaf puppies genotype(s)? Of the hearing puppies only, how many are expected to be homozygous for this trait (use a Punnett Square to solve).
n an example of recessive epistasis the deposition of pigment into hair follicles of the Labrador Retriever is governed by a dominant gene (C) and lack of deposition by its recessive allele (c). Lack of pigment deposition produces a yellow coat color. The color of pigment is governed by an independently assorting hypostatic gene, the dominant allele (B) produces black pigment and its recessive allele (b) produces brown. What coat color ratio is expected from the cross of a brown dog (bbCc) to a black dog (BbCc)? 1/2 brown, 1/2 black 1/4 black, 1/4 brown, 1/2 yellow 1/2 black, 1/4 brown, 1/4 yellow 3/8 black, 1/8 brown, 1/2 yellow 3/8 black, 3/8 brown, 1/4 yellow
In Labrador retrievers, two genes determine fur color: the E gene and the B gene. Black fur (B) is dominant to brown fur (b). However, the presence of (ee) will overshadow and create a puppy with yellow fur. Create a Punnett square crossing 2 Labs that are heterozygous for both genes. What are the resulting phenotypes? Don’t forget to take epistasis into account!
In an example of recessive epistasis the deposition of pigment into hair follicles of the Labrador Retriever is governed by a dominant gene (C) and lack of deposition by its recessive allele (c). Lack of pigment deposition produces a yellow coat color. The color of pigment is governed by an independently assorting hypostatic gene, the dominant allele (B) produces black pigment and its recessive allele (b) produces brown. What coat color ratio is expected from the cross of a brown dog (bbCc) to a black dog (BbCc)? 3/8 black, 1/8 brown, 1/2 yellow 3/8 black, 3/8 brown, 1/4 yellow 1/2 brown, 1/2 black 1/2 black, 1/4 brown, 1/4 yellow 1/4 black, 1/4 brown, 1/2 yellow