Exam 13: Meiosis

Hexaploid wheat was produced synthetically by He and coworkers. They mated the diploid species, Aegilops tauschii, and the tetraploid species, T. turgidum. Which of the following is an accurate statement about the relative contribution of each parent to the genome of the hexaploid offspring?

Sexual reproduction

Chromosome number of hexaploid wheat, Triticum aestivum, can be represented by which of the following?

At what stage of meiosis does DNA replication take place?

Genetic recombination takes place in which of the following processes?

Somatic cells of roundworms have four chromosomes. How many chromosomes would you find in an ovum from a roundworm?

Sister chromatids separate during

Adaptation to a changing environment is likely to occurs most quickly through which of the following processes?

What is a major difference between mitosis and meiosis I?

The diploid number of a roundworm species is 4. You have a male and a female roundworm that are planning a family. Assuming random segregation of homologues during meiosis and no crossover, how many different possible combinations of chromosomes might there be in the offspring?

Asexual reproduction takes place by which of the following processes?

Meiosis involves the creation of haploid cells from diploid cells. The haploid chromosome number is created when

In sexual reproduction, the variation among offspring, and the fact that they are genetically different from their parents, is due to which of the following?

Figure 13.2 -The karyotype shown above is that of a snail, Pomacea patula catemacensis. What is the diploid number for this organism?

For the duration of meiosis I, each chromosome is

Which of the following is an example of monosomy?

Figure 13.6 -Just prior to meiosis, DNA is replicated. Each resulting piece of replicated DNA is considered to be chromosomes) and is made up of chromatics).

Figure 13.3 -In Figure 13.3, what major event is taking place during this phase of meiosis?

Figure 13.5 -Grasshoppers have 11 pair of autosomes, and one sex chromosome. Which chromosome in Figure 13.5 is the sex chromosome?

Chromosomes and their homologues align at the equator of the cell during