Multiple Choice
Which of the following is an example of genetic diversity within a rain forest?
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12. Meiosis
Genetic Variation During Meiosis
Multiple Choice
Which of the following processes occurs when homologous chromosomes cross over in meiosis I?
A
Two sister chromatids get tangled, resulting in one re-sequencing its DNA.
B
Two sister chromatids exchange identical pieces of DNA.
C
Maternal alleles are "corrected" to be like paternal alleles and vice versa.
D
Corresponding segments of non-sister chromatids from homologous chromosomes are exchanged.
Verified step by step guidance1
Understand the concept of homologous chromosomes: These are pairs of chromosomes, one from each parent, that are similar in shape, size, and genetic content.
Learn about meiosis I: This is the first division in meiosis where homologous chromosomes are separated into different cells.
Explore the process of crossing over: During prophase I of meiosis, homologous chromosomes pair up and exchange segments of their DNA.
Identify non-sister chromatids: These are chromatids from homologous chromosomes that are not identical but correspond to each other.
Recognize the result of crossing over: The exchange of DNA segments between non-sister chromatids leads to genetic variation in the resulting gametes.
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