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

Answer:

F1= All Yy

F1= All yellow

F2=  1/4 YY: 1/2 Yy: 1/4 yy

F2= 3/4 yellow: 1/4 green

Explanation:

The allele for the yellow-colored seeds (Y) is dominant over the allele that imparts green phenotype (y). A cross between two pure breeding yellow seeded and green seeded plants would obtain all yellow seeded plants in the F1 generation. Self-pollination of F1 progeny would obtain F2 generation in following phenotype and genotype ratio:

Phenotype ratio= 3/4 yellow: 1/4 green

Genotype ratio= 1/4 YY: 1/2 Yy: 1/4 yy