Question 1

Which of the following best describes the difference between sexual and asexual reproduction?

Accepted Answer

Sexual reproduction involves two parents and produces offspring with unique genetic combinations, while asexual reproduction involves one parent and produces genetically identical offspring.

Question 2

During meiosis, what is the result of the reduction division in terms of chromosome number in human gametes?

Accepted Answer

Gametes end up with 23 chromosomes, half the number of somatic cells.

Question 3

Which process is responsible for producing haploid gametes in humans?

Accepted Answer

Meiosis

Question 4

What is the evolutionary significance of meiosis?

Accepted Answer

It creates new combinations of genes, leading to genetic variation and allowing the best suited individuals to reproduce.

Question 5

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

Accepted Answer

Mitotic cell division

Question 6

If a human cell undergoes mitosis, what will be the chromosome number in each daughter cell?

Accepted Answer

$$46$$

Question 7

Which term describes the location of a gene on a chromosome?

Accepted Answer

Locus

Question 8

A child inherits the allele for brown eyes (B) from one parent and the allele for blue eyes (b) from the other. What is the expected eye color phenotype?

Accepted Answer

Brown eyes, because the brown allele is dominant over the blue allele.

Question 9

Which of the following is an example of asexual reproduction?

Accepted Answer

Budding in yeast

Question 10

What is the main difference between autosomes and sex chromosomes in humans?

Accepted Answer

Autosomes are always identical pairs, while sex chromosomes differ between males and females.

Question 11

During metaphase I of meiosis, what is the probability that a gamete will receive a particular homologous chromosome from a pair?

Accepted Answer

$$50\%$$

Question 12

Which of the following statements about alleles is correct?

Accepted Answer

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

Question 13

Which process results in the production of recombinant chromosomes?

Accepted Answer

Crossing over

Question 14

A karyotype of a normal human female will show which combination of sex chromosomes?

Accepted Answer

$$XX$$

Question 15

Which of the following is NOT a form of asexual reproduction?

Accepted Answer

Fertilization

Question 16

Why might a population that reproduces asexually struggle to survive if the environment changes rapidly?

Accepted Answer

Asexual reproduction produces genetically identical individuals, which may not be suited to new environmental conditions.

Question 17

Which equation correctly represents the chromosome number change during meiosis in humans?

Accepted Answer

$$2n \rightarrow n$$

Question 18

Which of the following best explains why offspring from sexual reproduction are genetically unique?

Accepted Answer

Because of independent assortment, crossing over, and random fertilization.

Question 19

Which statement about homologous chromosomes is correct?

Accepted Answer

They have the same length, centromere position, and staining pattern, but may carry different alleles.

Question 20

Which of the following is a real-world example of parthenogenesis?

Accepted Answer

A female fish producing offspring without fertilization.

Meiosis and Sexual Life Cycles: Study Notes for General Biology

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