The cat breeder has found a cat that carries a gene that causes them to have bea
ID: 174380 • Letter: T
Question
The cat breeder has found a cat that carries a gene that causes them to have beautiful steel gray fur However, the allele for gray fur is recessive. If the dominant allele is present the cat will be completely white. Both cats are in high demand though. If the breeder purchases a purebred cat that is steel gray and has a short tail, what will be the result if he crosses it to a purebred white cay with a long tail? Draw the punnett square and determine the genotype and phenotype ratios below. If the cat breeder takes a brother and sister from the cats born above and crosses them, what would be the distribution of phenotypes (the phenotypic ratio) and the genotypes? Complete the punnett square below - show the gametes on both sides and fill in the phenotypes/genotypes and then count them up.Explanation / Answer
The cat breeder has found a cat that carried a gene causes them to have a beautiful steel
gray hair----------recessive---------allele –w
white -----dominant--------------- allele –W
gray hair, short tail --- GENOTYPE ----ww SS
white,LONG TAIL GENOTYPE-------------WW ss
gray hair, short tail --- ww SS x white, LONG TAIL GENOTYPE-------------WW ss
f1---------offspring---------- Ww Ss -----------------white and short tail
f1---------offspring---------- Ww Ss x WWss white cat with long tail( pure
WS
W s
w S
w s
Ws
WS Ws
white short tail
W s Ws
White long tail
w S Ws
white short tail
w s Ws
white long tail
Ws
WS Ws
white short tail
W s Ws
white long tail(
w S Ws
white short tail
w s Ws
white long tail(
Ws
WS Ws
white short tail
W s Ws
white long tail
w S Ws
white short tail
w s Ws
white short tail
Ws
WS Ws
white short tail
W s Ws
white long tail
w S Ws
white short tail
w s Ws
white long tail
white short tail
9/16
White long tail
7/16
phenotype the F2 ratio 9:3:3:1 is modified to 9:7. Due to epistatsis
WS
W s
w S
w s
Ws
WS Ws
white short tail
W s Ws
White long tail
w S Ws
white short tail
w s Ws
white long tail
Ws
WS Ws
white short tail
W s Ws
white long tail(
w S Ws
white short tail
w s Ws
white long tail(
Ws
WS Ws
white short tail
W s Ws
white long tail
w S Ws
white short tail
w s Ws
white short tail
Ws
WS Ws
white short tail
W s Ws
white long tail
w S Ws
white short tail
w s Ws
white long tail
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