Question

What type of gamete is produced following exchange of chromosome segments during the first prophase of meiosis?

a. Parental gamete
b. Noncrossover gamete
c. Recombinant gamete
d. Heterozygous gamete

Answer 1

During the first prophase of meiosis, crossing over occurs between homologous chromosomes, resulting in the exchange of genetic material.Thus correct option is c. Recombinant gamete

Step-by-step explanation:

During the first prophase of meiosis, crossing over occurs between homologous chromosomes, resulting in the exchange of genetic material. This process leads to the creation of recombinant gametes. Recombinant gametes possess combinations of alleles that differ from those found in the parental gametes, contributing to genetic diversity in offspring.

In meiosis, the exchange of chromosome segments during crossing over occurs due to the breaking and rejoining of chromatids from homologous chromosomes. As a result, the alleles on the chromatids are shuffled, leading to the formation of new combinations. The frequency of recombinant gametes can be calculated using the formula for recombination frequency, which is the number of recombinant gametes divided by the total number of gametes produced. This frequency can vary depending on the distance between genes on a chromosome; closer genes exhibit lower recombination frequencies while genes farther apart show higher frequencies of recombination.

Understanding the production of recombinant gametes is crucial in comprehending genetic inheritance patterns. The process of crossing over allows for genetic variability in offspring, as it creates novel combinations of alleles that may differ from those present in the parental gametes. This genetic diversity plays a significant role in evolution by introducing variations within populations, which can be acted upon by natural selection.

Answer 2

The exchange of chromosome segments during the first prophase of meiosis results in the formation of recombinant gametes due to genetic recombination, creating unique allele combinations. Recombinant gametes contribute to genetic diversity in offspring by carrying a mix of alleles from both parental chromosomes. Therefore the correct option is c Recombinant gamete

Step-by-step explanation:

During the first prophase of meiosis, homologous chromosomes exchange segments in a process known as crossing over. This exchange results in genetic recombination, leading to the formation of new combinations of alleles on the chromosomes. As a result, the gametes produced following this exchange are referred to as recombinant gametes. These gametes possess a unique combination of genetic information compared to the original parental chromosomes, contributing to genetic diversity in offspring.

Genetic recombination occurs due to the breakage and rejoining of chromatids at corresponding points along homologous chromosomes. The process involves the swapping of genetic material between chromatids, leading to a mix of alleles from the maternal and paternal chromosomes.

Each recombinant gamete carries a unique assortment of alleles, differing from both the original parental gametes and non-recombinant (non-crossover) gametes.

The formation of recombinant gametes is vital in increasing genetic variability within a population, as it generates offspring with diverse traits. The distribution of these newly formed genetic combinations follows the principles of Mendelian genetics and contributes significantly to the variability observed in sexually reproducing organisms. Thus, the exchange of chromosome segments during the first prophase of meiosis results in the production of recombinant gametes, crucial for genetic diversity and evolution.Thus the correct option is c.