Question 1

A gametophyte is a what?

Accepted Answer

A gametophyte is a haploid multicellular plant that produces gametes, which fuse during fertilization to form a diploid zygote. Gametophytes are found in the life cycles of plants that undergo alternation of generations, such as mosses and ferns.

Question 2

A cell that has only one set of chromosomes and thus, one set of genes is said to be what?

Accepted Answer

A cell that has only one set of chromosomes and thus, one set of genes is said to be haploid.

Question 3

A cell that is said to be haploid has

Accepted Answer

A haploid cell only has one set of chromosomes, while a diploid cell has two sets. This is important in sexual reproduction, as haploid gametes from two parents combine to form a diploid zygote.

Question 4

Meiosis reduces the diploid number of chromosomes by half to prevent the number from ____ after sexual reproduction.(Outcome #2)

Accepted Answer

Meiosis reduces the diploid number of chromosomes by half, from 2n to n, in order to produce haploid cells for sexual reproduction. If the diploid number of chromosomes did not reduce, the number of chromosomes would increase with each generation, leading to abnormalities and genetic disorders.

Question 5

Fertilization is a process by which

Accepted Answer

Fertilization is the process by which a sperm cell from a male and an egg cell from a female unite to form a zygote (a single cell with a full set of chromosomes). This zygote is the beginning of a new individual, with genetic information from both parents.

Question 6

In one statement, what is sexual reproduction?

Accepted Answer

Sexual reproduction involves the production of haploid cells (gametes) from two different parents, and then the fusion of these gametes to form a single, unique diploid cell (zygote). This process ensures genetic diversity in offspring.

Question 7

Which of the following is not a main category of sexual life cycle in multicellular organisms?

Accepted Answer

Chiasma-dominant is not a main category of sexual life cycle in multicellular organisms. The three main categories are haploid-dominant, diploid-dominant, and alternation of generations.

Quiz 7: The Cellular Basis of Inheritance