Question

The dwarf phenotype is recessive to the tall phenotype in pea plants. When one tall plant and one dwarf plant are crossed together, 50% of their offspring are tall, and the other 50% displays dwarfism. What is the genotype of each parent in this cross?

Answer 1

Tt (heterozygous tall) and homzygous short (tt)

Step-by-step explanation:

This question involves one gene coding for height in pea plants. The allele for tallness (T) is dominant over the allele for shortness (tt). This means that dwarf phenotype is recessive to the tall phenotype in pea plants.

According to this question, a tall plant and a dwarf plant (tt) are crossed together. 50% of their offspring are tall, and the other 50% displays dwarfism. This is an equal ratio. Since the dwarf plant can only be "tt", the tall plant must be heterozygous "Tt" to be produced.

Hence, a cross between Tt vs tt will produce ½tall plants and ½short plant.