Waxy endosperm (wx), shrunken endosperm (sh), and yellow seedling (v) are encode
ID: 132163 • Letter: W
Question
Waxy endosperm (wx), shrunken endosperm (sh), and yellow seedling (v) are encoded by three recessive genes in corn that are linked on chromosome 5. A corn plant homozygous for all three recessive alleles is crossed with a plant homozygous for all the dominant alleles. The resulting F1 are then crossed with a plant homozygous for the recessive alleles in a three- point testcross. The progeny of the testcross are: wx sh V 87, Wx Sh v 94, Wx Sh V 3,479, wx sh v 3,478, Wx sh V 1,515, wx Sh v 1,531, wx Sh V 292, Wx sh v 280, Total 10,756
What were the genotypes of the true-breeding parents of the trihybrid? (both chromosomes)
Explanation / Answer
wx sh V =87,
Wx Sh v =94
Wx Sh V =3479
wx sh v =3478
Wx sh V =1515
wx Sh v =1531
wx Sh V= 292
Wx sh v= 280
Total 10,756
From the questions, we can see that :
Parental combinations are with the higest frequency and they are with frequency 3479 and 3478
Parental genotypes will be :
Wx Sh V
Wx Sh V
and
wx sh v
wx sh v
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