$$8$$ million \times 8$$ million = 64$$ trillion

Question 1

Which of the following statements best explains why offspring produced by asexual reproduction are genetically identical to the parent?

Accepted Answer

Asexual reproduction produces offspring from a single parent cell by mitosis, resulting in identical copies of the parent's DNA.

Question 2

During which phase of the cell cycle does chromosome duplication occur?

Accepted Answer

Interphase

Question 3

Human somatic cells contain 46 chromosomes. After mitosis, how many chromosomes will each daughter cell contain?

Accepted Answer

$$46$$

Question 4

Which process is responsible for producing gametes with half the number of chromosomes as body cells?

Accepted Answer

Meiosis

Question 5

A zygote is formed by the fusion of two gametes. If each gamete contains $$n$$ chromosomes, how many chromosomes will the zygote have?

Accepted Answer

$$2n$$

Question 6

Which of the following mechanisms does NOT contribute to genetic variation in sexually reproducing organisms?

Accepted Answer

Binary fission

Question 7

If a person has trisomy 21, how many total chromosomes are present in their somatic cells?

Accepted Answer

$$47$$

Question 8

Which statement best describes Mendel's law of independent assortment?

Accepted Answer

Alleles for each trait separate independently during meiosis.

Question 9

A heterozygous individual for a trait has which combination of alleles?

Accepted Answer

Two different alleles (Aa)

Question 10

Which of the following is an example of incomplete dominance?

Accepted Answer

A cross between red and white flowers produces pink flowers.

Question 11

In a dihybrid cross between two heterozygous parents (YySs x YySs), what is the expected phenotypic ratio for the offspring?

Accepted Answer

$$9:3:3:1$$

Question 12

Which of the following best explains why X-linked recessive disorders are more common in males than females?

Accepted Answer

Males have only one X chromosome, so a single recessive allele will cause the disorder.

Question 13

Which process during meiosis increases genetic diversity by exchanging segments of homologous chromosomes?

Accepted Answer

Crossing over (recombination)

Question 14

A carrier for a recessive genetic disorder has which genotype?

Accepted Answer

Aa

Question 15

Which of the following is an example of pleiotropy?

Accepted Answer

A gene that affects both red blood cell shape and organ damage

Question 16

If a human cell undergoes mitosis, what is the result?

Accepted Answer

Two genetically identical diploid cells

Question 17

Which of the following best describes the difference between mitosis and meiosis?

Accepted Answer

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

Question 18

Which equation correctly represents the total number of possible chromosome combinations in a human zygote, given independent assortment?

Accepted Answer

$$8$$ million 	imes 8$$ million = 64$$ trillion

Question 19

Which of the following is true about linked genes?

Accepted Answer

Linked genes are located close together on the same chromosome and tend to be inherited together.

Question 20

Which of the following best describes codominance in human blood type?

Accepted Answer

Both IA and IB alleles are expressed equally, resulting in type AB blood.

Cell Division, Chromosomes, and Inheritance: Study Notes for General Biology

Study Guide - Practice Questions