You are studying pea plants. You cross yellow seed plants with green seed plants and get all yellow seed plants. You take one of those new yellow seed plants and cross it with a green seed plant. What are the chances of getting green seeds in the offspring?
You are studying pea plants. You cross yellow seed plants with green seed plants and get all yellow seed plants. You take one of those new yellow seed plants and cross it with a green seed plant. What are the chances of getting green seeds in the offspring?
It is given that yellow seed plants are crossed with green seed plants and all of the progeny showed yellow seed plants. This made us understood that both the parents of first generation are homozygous in nature.
The genotype of yellow seed plants would be (YY) and green seed plants would be (yy). Here, yellow seed plants are dominant over green seed plants and are expressed in all of the progenies in first generation. In the second generation if one of the yellow seed plants from first generation is crossed with green seed plants it will result as follows:
F1 generation: Cross between two homozygous parent plants YY × yy. This has resulted in heterozygous F1 offspring with the green seed plants. This has produced two types of gametes Y and y.
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Y |
Y |
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y |
Yy |
Yy |
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y |
Yy |
Yy |
Yy - yellow seed plants since yellow seed is dominant over green seed
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