our sister breeds Labradors, but is unaware of the genetics of coat color, so she has been mixing and matching various breeding pairs, unable to predict the outcomes. She recently bred two black labs, expecting to get only black lab puppies, but instead, the litter included black, brown, and yellow pups. She is confused, but since you know your genetics, you can explain to her what’s going on. What are the genotypes of these two parents, for both of the genes involved? What are the possible genotypes of the various offspring? (Organize them by phenotype.) Litters of puppies are too small for reliable statistics, but if these two parents had a large number of puppies over time, what are the expected ratios (or fractions or percents) of the three possible coat colors?
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our sister breeds Labradors, but is unaware of the genetics of coat color, so she has been mixing and matching various breeding pairs, unable to predict the outcomes. She recently bred two black labs, expecting to get only black lab puppies, but instead, the litter included black, brown, and yellow pups. She is confused, but since you know your genetics, you can explain to her what’s going on.
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What are the genotypes of these two parents, for both of the genes involved?
-
What are the possible genotypes of the various offspring? (Organize them by
phenotype .) -
Litters of puppies are too small for reliable statistics, but if these two parents had a large
number of puppies over time, what are the expected ratios (or fractions or percents) of the three possible coat colors?
-
Introduction :-
Genes are the basic units of inheritance that carry instructions for the development of an organism. They are made of DNA and are located on chromosomes in cells. Genes determine an organism's traits and characteristics, such as eye color, hair color, and height. They provide the instructions for making proteins, which are the building blocks of life. Every person has a unique set of genes, which are inherited from their parents, and these genes interact with each other and the environment to determine an individual's traits and characteristics.
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