CH 13 BIO 101

25 July 2022
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question
Asexual reproduction occurs during which of the following processes?
answer
mitosis
question
Which of the following is not a function of meiosis?
answer
cause an organism to grow (Meiosis produces gametes and creates genetic variability, but it is not used to increase cell numbers of an organism.)
question
Which of the following statements describes an example of alternation of generations?
answer
A diploid plant (sporophyte) produces a spore by meiosis that gives rise to a multicellular, haploid pollen grain (gametophyte).
question
Many organisms spend most of their life cycle in the diploid state. If meiosis produces haploid cells, how is the diploid number restored for these types of organisms?
answer
by fertilization
question
Which of the following statements is correct regarding the human X chromosomes?
answer
It carries genes that determine an individual's biological sex.
question
Which of the following statements correctly describes a karyotype?
answer
It is an organized image of a cell's chromosomes.
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Which of the following statements describes the chromosomal makeup of each daughter cell after telophase of meiosis I?
answer
The cells are haploid, and the chromosomes are each composed of two chromatids.
question
Which of the following events happens at the conclusion of meiosis I?
answer
Homologous chromosomes of a pair are separated from each other.
question
During which of the following processes does independent assortment of chromosomes occur?
answer
in meiosis I only
question
During which of the following processes do homologous pairs of chromosomes align adjacent to one another at the metaphase plate of a cell?
answer
metaphase I of meiosis
question
Which of the following processes occurs in meiosis but not in mitosis?
answer
synapsis of chromosomes
question
Which of the following processes facilitates the fastest way for organisms to adapt to a changing environment?
answer
sexual reproduction
question
Klinefelter syndrome can result from nondisjunction during
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meiosis I or II in either parent. (Klinefelter syndrome may result from nondisjunction in either the male or female, since both parents possess at least one X chromosome.)
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All but which one of the following results from nondisjunction?
answer
diploidy {Nondisjunction leads to either additional chromosomes (trisomy), additional pairs of chromosomes (polyploidy), or missing chromosomes (monosomy).}
question
An individual with Swyer syndrome differs from an individual with Klinefelter syndrome because
answer
an individual with Klinefelter syndrome has a functional SRY gene on his Y chromosome, whereas an individual with Swyer syndrome does not. (Swyer syndrome, or an XY female, results from an individual with an XY karyotype who lacks a functional SRY gene on the Y chromosome. Since this gene is necessary for development of the male phenotype, the individual develops as a female.)