When crossing sweet peas with a mustache and bright color of flowers with plants having a pale color of flowers

When crossing sweet peas with a mustache and bright color of flowers with plants having a pale color of flowers and without a mustache, in F1 all plants were with bright flowers and mustaches. In F2, this cross produced 424 plants with bright flowers and whiskers, 102 with bright flowers and no whiskers, 99 with pale flowers and whiskers, and 89 with pale flowers and without whiskers. When crossing bright-flowered plants without whiskers with plants with pale flowers and whiskers, the hybrids of the first generation were the same as in the first crossing, and 797 plants with bright flowers and whiskers were obtained in F2, 300 – bright-flowered without whiskers and 37 – pale-flowered no mustache. How are these traits inherited? Prove.

Given: A – mustache

a – no mustache

B – bright color of flowers

b – pale color of flowers

So, let’s proceed to crossing, since all the individuals obtained during crossing had a bright color and mustache, the parent individuals were digomozygous:

R: AABB x aabb

Parental dihomozygous individuals gave one type of gametes each: AB and ab, respectively.

The first generation hybrids had the following genotype:

F1: AaBb

And phenotype: Bright flowers and mustache.

Upon further crossing, these hybrids give four types of gametes: AB, Ab, aB, ab.

Accordingly, they have the following phenotypes:

A_B_ – bright flowers, the presence of a mustache

А_bb – bright flowers without a mustache

aaB_ – pale flowers, mustache

aabb – pale flowers without a mustache