Question

Cross to find genotype of a pea plant bearing violet flowers

Answer 1

*HI FRIEND *

VIOLET colour of flowers is a dominant phenotype in pea plants. The genotype of such plants can be determined by a test cross.
The genotype – a term coined by Danishbotanist, plant physiologist and geneticist Wilhelm Johannsen in 1903 – is the part (DNA sequence) of the genetic makeup of a cell, and therefore of an organism or individual, which determines a specific characteristic (phenotype) of that cell/organism/individual.

NOW,
the cross:- consider a pea plant bearing white flowers and the pea plant bearing violet flowers cross each other...

White allele : vv
Violet allele:- VV

CROSSING :- Monohybrid crossing

P¹--- VV. vv

Alleles-- V. V. v. v.

F1---- Vv. Vv. Vv. Vv.

The alleles in the first generation have violet as dominant allele. Since we are seeing only one characteristic therefore we are using MONOHYBRID CROSS

The same you can do it to find the F2 generation. The only thing is that you have to cross Vv and Vv and the alleles will be in the ratio 3:1 as in one of the plants white will express itself because it has no dominant gene....

P2:- Vv. Vv.

Allele :- V. v. V. v

F2:- VV. Vv. Vv. vv


Sorry if I am not giving the required information...

May this knowledge helps everyone who sees this question....

REGARDS....

Answer 2

Answer:

if the offspring produced by the test cross is 50% purple and 50% white flower then the genotype of the purple flower pea plant is heterozygous dominant (Pp). If all the flower produced is purple coloured then the genotype of the purple flower is homozygous dominant (PP).