Question

1. If a plant homozygous for tall is crossed with one homozygous for dwarf, what will be the appearance of the F1; of the F2; of the offspring of a cross of F1 with its tall parent; with its dwarf parent?

2 Let the allele for tall be represented by T, and the allele for dwarfness by t. What will be the​

Answer 1

The condition given is that a plant (Homozygous tall) is crossed with a plant (Homozygous dwarf), then the appearance of the plats or saplings at the F₁ generation would be all tall plants.

The plants are homozygous tall, so their alleles will be the same. Consider a plant with tallness TT and a plant with dwarfness tt.

All the F₁ generation plants have a dominant "T". Therefore, all the saplings will be tall.

CONCLUSION - ALL THE SAPLINGS WILL BE TALL.

CONCEPTS USED:

Homozygoes - Homozygous in biology means that both alleles are identical. For example, if it is said that a fruit is homozygous sweet, it has identical sweet traits.

Heterozygous - Heterozygous in biology means that both alleles are not identical, but they are contrasting. For example, if a fruit is heterozygous sweet, it has a allele for sweetness and a allele for other flavours.

Step-by-step explanation: