Question

Explain the cross between plant having white flower and purple flower

Answer 1

In a cross between plants with purple flowers and plants with white flowers the offsprings of F1 generation all had white flowers. When the F1 generation was self-crossed, it was observed in the F2 generation that out of 100, 75 flowers were white. Make a cross and answer the following:

Answer 2

Mendel cross in flower

Explanation:

• Suppose white is dominant over purple flowers ..
• WW  *  pp  ( genotypic ratio )
• white  *  purple  ( phenotypic ratio )
• W  *  p   ( gamates )
•  Wp ....( white flower as dominant is expressed )
• Selfin
• Wp  *  Wp
• white  *  white
• W * p  *  W *  p
• WW : Wp : Wp : pp
• 3 : 1 ( white : purple ) F2 = phenotypic ratio
• 1 : 2 : 1 ( white : impure white : purple )  F2 = genotypic ratio
• i.e; ....... b) white : purple is  3 : 1
• And then the genotypes were  white , impure white , purple in the ratio 1 : 2 : 1