Question 1

Which of the following best describes homologous chromosomes as shown in the first image?

Accepted Answer

They are chromosomes that carry the same genes but may have different alleles, one inherited from each parent.

Question 2

What is the significance of the centromere as labeled in the second image?

Accepted Answer

It is the region where sister chromatids are attached and spindle fibers bind during cell division.

Question 3

During which phase of meiosis does crossing over, as shown in the fourth image, most commonly occur?

Accepted Answer

Prophase I

Question 4

Based on the third image, what is the chromosome number and ploidy of the cells immediately after Meiosis I?

Accepted Answer

23 chromosomes, haploid ($$1n)$$

Question 5

Which event during meiosis increases genetic diversity, as illustrated in the fourth image?

Accepted Answer

Crossing over between homologous chromosomes

Question 6

What is the main difference between the outcomes of mitosis and meiosis as shown in the ninth image?

Accepted Answer

Mitosis produces two genetically identical diploid cells, while meiosis produces four genetically unique haploid cells.

Question 7

If a cell with 46 chromosomes undergoes meiosis, how many chromosomes will each resulting gamete contain?

Accepted Answer

$$23$$

Question 8

Which process ensures that each gamete receives only one chromosome from each homologous pair?

Accepted Answer

Independent assortment during Metaphase I

Question 9

What is the result of nondisjunction during Anaphase I of meiosis, as could be inferred from the diagrams?

Accepted Answer

Some gametes will have an extra chromosome, and some will be missing one.

Question 10

Which of the following best explains why gametes are genetically unique after meiosis?

Accepted Answer

Crossing over and independent assortment shuffle alleles and chromosomes.

Chapter 26: The Reproductive System – Comprehensive Study Notes

Study Guide - Practice Questions