Q: Which equation best represents the number of DNA molecules in a cell during metaphase of mitosis if the cell started with $$2n$$ chromosomes?

$$ \text{DNA molecules} = 4n $$

Question 1

Which of the following best describes the primary purpose of mitosis in multicellular organisms?

Accepted Answer

To generate identical daughter cells for growth and tissue repair

Question 2

During which stage of mitosis do chromosomes align at the cell's equatorial plane?

Accepted Answer

Metaphase

Question 3

A cell with 2n = 46 chromosomes undergoes meiosis. How many chromosomes will each resulting gamete contain?

Accepted Answer

23

Question 4

Which event occurs during prophase I of meiosis but not during mitosis?

Accepted Answer

Homologous chromosomes pair and undergo crossing over

Question 5

If a mutation occurs at a specific locus on a chromosome, which of the following statements is correct?

Accepted Answer

The locus refers to the physical location of the gene on the chromosome

Question 6

Which of the following best explains why meiosis increases genetic diversity?

Accepted Answer

It involves crossing over and independent assortment of chromosomes

Question 7

A cell in an organism has just completed mitosis. Which of the following is true about the daughter cells?

Accepted Answer

They are genetically identical to the parent cell

Question 8

Which formula correctly represents the chromosome number after meiosis in a diploid organism?

Accepted Answer

$$ n = \frac{2n}{2} $$

Question 9

A patient is diagnosed with a disorder caused by a mutation in one allele at a specific locus. Which term best describes the alternative forms of this gene?

Accepted Answer

Alleles

Question 10

Which of the following statements about homologous chromosomes is correct?

Accepted Answer

They carry the same genes at the same loci but may have different alleles

Question 11

During which phase of the cell cycle does DNA replication occur?

Accepted Answer

S phase

Question 12

A scientist observes a cell with chromosomes being pulled apart toward opposite poles. Which stage is the cell most likely in?

Accepted Answer

Anaphase

Question 13

Which of the following is a key difference between mitosis and meiosis?

Accepted Answer

Meiosis involves two rounds of cell division, mitosis only one

Question 14

A cell undergoes meiosis and produces four gametes. If nondisjunction occurs during meiosis II, what is the likely outcome?

Accepted Answer

Two gametes will have an abnormal chromosome number

Question 15

Which equation best represents the number of DNA molecules in a cell during metaphase of mitosis if the cell started with $$2n$$ chromosomes?

Accepted Answer

$$ 	ext{DNA molecules} = 4n $$

Question 16

Which of the following best describes the outcome of meiosis in terms of genetic content?

Accepted Answer

Daughter cells have half the chromosome number and are genetically unique

Question 17

A geneticist is studying a gene located at a specific locus on chromosome 7. Which statement is true regarding the locus?

Accepted Answer

The locus is the physical location of the gene on the chromosome

Question 18

Which of the following events is unique to meiosis and not found in mitosis?

Accepted Answer

Crossing over between homologous chromosomes

Question 19

If a cell with 2n = 24 chromosomes undergoes mitosis, how many chromosomes will each daughter cell have after division?

Accepted Answer

24

Question 20

Which of the following best describes the relationship between alleles and homologous chromosomes?

Accepted Answer

Alleles are alternative forms of a gene found at the same locus on homologous chromosomes

Cell Division, Mitosis, Meiosis, and Key Genetic Terminology

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