A female Australian shepherd with droopy ears (dd) and grey spotting (ss) is mated to a male dog with neither of these phenotypes (regular ears, no spots). They have six puppies: three puppies have droopy ears and no spots and three puppies have normal ears and no spots. Of the choices shown, which is the most liklely genotype of the male parent dog? (Use D and S to represent the dominant alleles for the ear and spot genes) Ddss DdSS DdSs DDSS ddSs O O O O O
A female Australian shepherd with droopy ears (dd) and grey spotting (ss) is mated to a male dog with neither of these phenotypes (regular ears, no spots). They have six puppies: three puppies have droopy ears and no spots and three puppies have normal ears and no spots. Of the choices shown, which is the most liklely genotype of the male parent dog? (Use D and S to represent the dominant alleles for the ear and spot genes) Ddss DdSS DdSs DDSS ddSs O O O O O
Human Anatomy & Physiology (11th Edition)
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Transcribed Image Text:A female Australian shepherd with droopy ears (dd) and grey spotting (ss) is mated to a male dog with neither of these phenotypes (regular ears, no spots). They have six puppies:
three puppies have droopy ears and no spots and three puppies have normal ears and no spots. Of the choices shown, which is the most liklely genotype of the male parent dog?
(Use D and S to represent the dominant alleles for the ear and spot genes)
Ddss
DdSS
DdSs
DDSS
ddSs
Expert Solution
Step 1
Answer : the moat likely genotype of the male parent dog will be :
b) DdSS.
Here the puppies are having the genotype of :
Three droopy ears and no spots : ddSS or ddSs
Three normal ears and no spots : DDSS or DdSs or DdSS.
Here D and S are the dominant gene over the d and s.
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