Each P1 parent of a monohybrid cross has completely identical genes.

Understanding Monohybrid Cross

A monohybrid cross is a genetic cross between two individuals that are heterozygous for one specific gene of interest. The P1 generation refers to the parental generation, which are the individuals that are crossed to produce the first generation of offspring.

Genetic Variability in P1 Parents: The P1 parents in a monohybrid cross do not have completely identical genes because they carry different alleles for the specific gene under study. Alleles are different forms of a gene that can lead to different traits. For example, if we are studying the gene for flower color in pea plants, one parent may carry the allele for purple flowers (P) and the other parent may carry the allele for white flowers (p).

Gene Inheritance in Monohybrid Cross

During a monohybrid cross, each parent will pass one of their alleles for the gene to their offspring. This results in genetic variability in the offspring, as they will inherit one allele from each parent. The offspring, known as the F1 generation, will be heterozygous for the gene being studied.

In conclusion, the statement that each P1 parent of a monohybrid cross has completely identical genes is false. The P1 parents have different alleles for the gene of interest, which leads to genetic variability in the offspring.