Question

Think and discuss: In this Gizmo, only one crossover is allowed in each segment. In reality, crossovers can occur at almost any point along the chromosome. How do the random distribution of chromosomes and crossovers create more variation in the resulting gametes?

Answer 1

Answer:

Crossing over and random distribution of chromosome will lead to random assortment of new combinations of alleles on the same chromosome.

Explanation:

Crossing can be defined as the exchange of genetic material between homologous chromosomes.

Variation can occur when the sister chromatids have mixture of alleles ( paternal).

This leads to genetic diversity.

This genetic variation is the bedrock and foundation of evolution. This bring about differences in different organisms and when organism differs genetically, they will have different level of adaptability and survival instincts. The eventual result of this is survival of the fittest.

Answer 2

Explanation:

Crossing over occurs in prophase-I during meiosis in which the exchange of genetic material takes place between non-sister chromatids of homologous chromosomes. As a consequence of this, each chromosome contains a new combination of genes.

After that, at the stage of anaphase-I, alleles of different genes get separated independently of one another into gametes. It results in the gametes with unique combination of chromosomes causing diversity in the traits.