Chapter 11

If \(2 n\) is four, the number of possible combinations of chromosomes in the resulting gametes, excluding any crossing-over, is: a. 1 b. 2. c. 4 d. 8. e. 16

The DNA content in a diploid cell in \(\mathrm{G}_{2}\) is X. If that cell goes into meiosis at metaphase II, the DNA content will be: a. \(0.1 \mathrm{X}\) b. \(0.5 \mathrm{X}\) c. X. d. \(2 \mathrm{X}\) e. \(4 \mathrm{X}\)

Metaphase in mitosis is similar to what stage in meiosis? a. prophase I b. prophase II c. metaphase I d. metaphase II e. crossing-over

In plants, the adult diploid individuals are called: a. spores. b. sporophytes. c. gametes. d. gametophytes. e. zygotes.

You have a technique that allows you to measure the amount of DNA in a cell nucleus. You establish the amount of DNA in a sperm cell of an organism as your baseline. Which multiple of this amount would you expect to find in a nucleus of this organism at \(\mathrm{G}_{2}\) of premeiotic interphase? At telophase I of meiosis? During interkinesis? At telophase II of meiosis?

One of the human chromosome pairs carries a gene that influences eye color. In an individual human, one chromosome of this pair has an allele of this gene that contributes to the formation of blue eyes. The other chromosome of the pair has an allele that contributes to brown eye color (other genes also influence eye color in humans). After meiosis in the cells of this individual, what fraction of the nuclei will carry the allele that contributes to blue eyes? To brown eyes?