Question

In pea plant the trait of yellow seeds (YY) is dominant over green seed (yy). Explain the inheritance pattern of F1 ad F2 generation with help of cross following the rules of inheritance of trait. show the visible characters F1 and F2 progenies and write the genotypic ratio and percentage.(one more small help it is three mark how mark is distributed in this question)

Answer 1

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Answer 2

Progeny genotype in F1 generation would be Yy, Yy, Yy, Yy.

Progeny genotype in F2 generation would be YY, Yy, Yy, yy.

Explanation:

As the one parent is homozygous dominant and another parent is homozygous recessive. So the gametes will be Y, Y, and y, y and after the cross, all the progeny would be heterozygous dominant.

                                      Y   Y

                               y     Yy Yy

                               y      Yy yY

So in F1 generation genotype ration is 4:0 and phenotype ratio will be 4:0.  so all the progeny would have yellow seed so the percentage is 100. For F2 generation gametes would be Y,y.  

                                         Y     y

                                    Y   YY  Yy

                                    y   Yy   yy

So in F2 generation ration would be 1:2:1 and phenotype ration would be 3:1. So three progeny would have yellow seed and one would have green seed. So here percentage of yellow seed is 75% and green seed is 25%.

Learn more about different cross:

• Monohybrid cross: https://brainly.in/question/6448872
• Phenotypic and genotypic ration in different cross: https://brainly.in/question/1117897