Question

1. explain why linked genes do not independently assort

1. explain how crossing over produces recombinants

Explanation:

Define independent assortment and gene linkage

Independent assortment occurs when genes are located on different chromosomes, allowing them to segregate individually during gamete formation.

Explain why linked genes do not assort independently

Linked genes are located close together on the same chromosome. Because they are physically connected, they tend to be inherited together as a single unit during meiosis rather than segregating independently.

Define crossing over

Crossing over is the exchange of genetic material between non-sister chromatids of homologous chromosomes during prophase I of meiosis.

Explain how crossing over produces recombinants

During crossing over, chromatids break and rejoin, swapping alleles between homologous chromosomes. This process breaks the linkage between genes, creating new combinations of maternal and paternal alleles (recombinant chromosomes) that differ from the parental combinations.

Answer:

Question 3

Linked genes do not assort independently because they are located close together on the same chromosome and are physically inherited together as a single unit during meiosis.

Question 4

Crossing over produces recombinants by allowing non-sister chromatids of homologous chromosomes to exchange genetic segments during prophase I of meiosis, which breaks existing gene linkages and creates new combinations of alleles.