Question 1

Which of the following best describes the main purpose of meiosis in humans?

Accepted Answer

To produce gametes with half the number of chromosomes as the parent cell

Question 2

If a human cell has 46 chromosomes, how many chromosomes will each gamete have after meiosis?

Accepted Answer

$$23$$

Question 3

Which process restores the diploid chromosome number in the human life cycle?

Accepted Answer

Fertilization

Question 4

In the context of human chromosomes, what is a homologous pair?

Accepted Answer

A pair consisting of one maternal and one paternal chromosome carrying genes for the same traits

Question 5

Which of the following statements about sexual and asexual reproduction is correct?

Accepted Answer

Sexual reproduction involves the fusion of gametes from two parents

Question 6

What is the ploidy of the zygote formed after fertilization in humans?

Accepted Answer

Diploid ($$2n)$$

Question 7

Which of the following best describes the alternation of generations in plants?

Accepted Answer

Plants alternate between haploid and diploid multicellular stages

Question 8

A karyotype is useful for which of the following purposes?

Accepted Answer

Displaying the ordered pairs of chromosomes in a cell

Question 9

Which of the following is true about the sex chromosomes in humans?

Accepted Answer

Females have two X chromosomes, while males have one X and one Y chromosome

Question 10

In fungi and some protists, which stage is the only diploid stage in the life cycle?

Accepted Answer

The zygote

Question 11

Which process is responsible for the genetic variation observed in sexually reproducing organisms?

Accepted Answer

Meiosis

Question 12

If a mutation occurs in a gene located at a specific locus on a chromosome, what is the most likely consequence for the offspring?

Accepted Answer

The mutation may be inherited if it occurs in a gamete

Question 13

Which of the following equations correctly represents the chromosome number in human somatic cells?

Accepted Answer

$$2n = 46$$

Question 14

Which of the following best explains why offspring from sexual reproduction are not identical to their parents?

Accepted Answer

Offspring receive unique combinations of genes from both parents

Question 15

Which of the following events occurs during fertilization in humans?

Accepted Answer

Two haploid gametes fuse to form a diploid zygote

Question 16

In the human life cycle, which process is responsible for the production of somatic cells from the zygote?

Accepted Answer

Mitosis

Question 17

Which of the following statements about gametes is correct?

Accepted Answer

Gametes are haploid cells produced by meiosis

Question 18

A scientist observes a cell with three pairs of homologous chromosomes, each pair consisting of one maternal and one paternal chromosome. What is the diploid number ($$2n) $$for this organism?

Accepted Answer

$$2n = 6$$

Question 19

Which of the following is NOT a function of mitosis in multicellular organisms?

Accepted Answer

Production of gametes

Question 20

In which type of organism does the multicellular adult exist only in the haploid state, with the zygote being the only diploid stage?

Accepted Answer

Fungi and some protists

Meiosis and the Sexual Life Cycle

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