AP BIOLOGY

CELL DIVISION

MEIOSIS

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

During which actions can an exchange of genetic information occur during meiosis, rather than during mitosis?

A	assortment and alignment
B	alignments and crossing over
C	crossing over and replication
D	assortment and crossing over

Explanation:

Detailed explanation-1: -During meiosis, homologous chromosomes may exchange genetic material during a process called “crossing over."

Detailed explanation-2: -Recombination in meiosis. Recombination occurs when two molecules of DNA exchange pieces of their genetic material with each other. One of the most notable examples of recombination takes place during meiosis (specifically, during prophase I), when homologous chromosomes line up in pairs and swap segments of DNA.

Detailed explanation-3: -Prophase I Figure 1: Recombination is the exchange of genetic material between homologous chromosomes. During prophase I, the chromosomes condense and become visible inside the nucleus.

Detailed explanation-4: -Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.

Detailed explanation-5: -Crossing over occurs between prophase I and metaphase I and is the process where two homologous non-sister chromatids pair up with each other and exchange different segments of genetic material to form two recombinant chromosome sister chromatids.

There is 1 question to complete.