In horses, assume that there are three colors affecting genes with the following effects: AA is lethal, Aa is white (albino), and aa allows color. B_ is black and bb is chestnut. D_ is solid and dd has white spots on color. (Albino would not show spots). A stallion that is heterozygous for all three genes and a mare of genotype AaBbdd are mated. a. What color is the mare and what are the genotypes of the gametes she produces? b. What is the color of the stallion and what are the genotypes of the gametes he produces? c. Construct a Punnett square and determine the frequencies of phenotypes that would be expected in the LIVE offspring.
In horses, assume that there are three colors affecting genes with the following effects: AA is lethal, Aa is white (albino), and aa allows color. B_ is black and bb is chestnut. D_ is solid and dd has white spots on color. (Albino would not show spots). A stallion that is heterozygous for all three genes and a mare of genotype AaBbdd are mated. a. What color is the mare and what are the genotypes of the gametes she produces? b. What is the color of the stallion and what are the genotypes of the gametes he produces? c. Construct a Punnett square and determine the frequencies of phenotypes that would be expected in the LIVE offspring.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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- In horses, assume that there are three colors affecting genes with the following effects: AA is lethal, Aa is white (albino), and aa allows color. B_ is black and bb is chestnut. D_ is solid and dd has white spots on color. (Albino would not show spots). A stallion that is heterozygous for all three genes and a mare of genotype AaBbdd are mated.
a. What color is the mare and what are the genotypes of the gametes she produces?
b. What is the color of the stallion and what are the genotypes of the gametes he produces?
c. Construct a Punnett square and determine the frequencies ofphenotypes that would be expected in the LIVE offspring.
Expert Solution
Step 1
A trihybrid cross in one in which organisms that vary by three different genes are crossed in order to study the inheritance of these three genes. The different types of gametes that a organism can produce with respect to that particular characters can be calculated by the number of characters that are heterozygous in nature. The expression 2n can be used to determine the different types of gametes produced, where n is the number of characters that are heterozygous in nature.
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