A guinea pig breeder is breeding pigs with wavy hair. She gets pure-breeding wav
ID: 11908 • Letter: A
Question
A guinea pig breeder is breeding pigs with wavy hair. She gets pure-breeding wavy-haired guinea pigs from 5 other breeders. She crosses the pigs in all possible combinations, and gets the following results
Strain 1 2 3 4 5
1 wavy hair straight hair wavy hair Wavy hair wavy hair
2 wavy hair straight hair straight hair straight hair
3 wavy hair wavy hair wavy hair
4 wavy hair Wavy hair
5 wavy hair
How many genes are there affecting whether a guinea pig has wavy or straight hair?
You cross Guinea pigs from strain 1 with guinea pigs from strain 2. What will be the phenotypic rations of the F2 generation.
Explanation / Answer
straight hair ---SS ,-----& CURLY HAIR------CC ARE CO-DOMINANT
WAVY HAIR---------SC
1. straight hair (ss) x curly hair (cc)-------------- wavy hair (sc)
2. wavy hair (sc) x straight hair (ss) -------------- straight hair (ss) & wavy hair (sc)
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