Question

During the molecular process of homologous recombination between homologous chromosomes,

A. a Holliday junction forms.

B. branch migration occurs.

C. a heteroduplex region forms.

D. all of the above occur.

Answer 1

During homologous recombination between homologous chromosomes, a Holliday junction forms, branch migration occurs, and a heteroduplex region forms. The correct answer is D. all of the above occur.

Step-by-step explanation:

The correct answer is D. all of the above occur. During the molecular process of homologous recombination between homologous chromosomes, several events occur. A Holliday junction forms, which is a temporary intermediate structure that allows for the exchange of genetic material between the chromosomes. Branch migration occurs, which refers to the movement of the Holliday junction along the DNA strands. Finally, a heteroduplex region forms, where there is a temporary mismatch of DNA sequences between the two homologous chromosomes.