Biology 2581B Chapter Notes - Chapter 8: G1 Phase, G2 Phase, Asexual Reproduction
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Question 1 (2 points)
In which phase of cell division is marked by the dissolution of the nuclear membrane, the condensation of chromosomes, and the formation of the mitotic spindle?
Question 1 options:
prophase | |
metaphase | |
telophase | |
anaphase |
Question 2 (2 points)
The physical separation of cells during cell division is called:
Question 2 options:
Cytokinesis | |
Telophase | |
Interphase | |
Chromosome | |
Cell plate |
Question 3 (2 points)
Meiosis is necessary for sexual reproduction; the gametes formed during this process before fertilization are _______________.
Question 3 options:
Haploid | |
Diploid | |
Zygote | |
Homologous | |
Tetrads |
Question 4 (2 points)
Mitosis is the process by which a ___________ cell separates the chromosomes in its nucleus into two identical sets of nuclei.
Question 4 options:
eukaryotic | |
prokaryotic | |
bacterial | |
all of these are correct |
Question 5 (2 points)
Which of the following statements about crossing over is INCORRECT?
Question 5 options:
It occurs between homologous chromosomes | |
It allows for two parents to produce many different types of offspring | |
It contributes to genetic diversity in a population | |
It occurs during prophase I of mitosis |
Which statements pertaining to genetic variability are correct? Check all that apply (note that wrong answers will be deducted from right answers)!
Crossing over is defined by the exchange of chromosome pieces during metaphase one of meiosis. |
If a germ cell (i.e. parent cell before meiosis) had only two pairs of homologous chromosomes (i.e. 4 chromosomes total) there are 2 possible combinations of maternal and paternal chromosomes in gametes. |
Siblings produced by sexual reproduction are different because sperms are different from one another and eggs are different from one another, and the combination of an egg and sperm is basically unique. |
Random fertilization means that all possible combinations of eggs and sperm are equally likely, i.e. it is pure chance which sperm fuses with which egg. |
Individual chromosomes contain thousands of genes. This means that during each crossing over event, more than one gene is exchanged between paternal and maternal chromosomes. |