2. Meiosis occurs in the organs of which body system? F muscle G nervous H circulatory J reproductive
3. What percentage of chromosomes normally found in the body cells of an organism do gamete cells contain after meiosis?
A 25% B 50% C 60% D 100%
4. If a horse has 64 chromosomes in each of its body cells, how many chromosomes will be in each gamete cell after meiosis?
F 32 G 64 H 96 J 128
5. What process shown to the right increases the variations of chromosomes?
A cellular respiration C cytokinesis B gene splicing D crossing-over
6. Which of these is a primary benefit of meiosis and sexual reproduction to a population?
F an increase in the chromosome number H new combinations of genes G new forms of proteins J new alleles in the population
7. Meiosis is significant within a population because it increases the –
F number of mature males H amount of genetically modified organisms G genetic variations in the population J number of new alleles available
8. Offspring that are the result of sexual reproduction are best described by which of the following?
A The offspring are genetically identical to the biological mother and father B The offspring are genetically unique and contain a new combination of genes C The offspring contain fewer chromosomes than either parent because of meiosis D The offspring contain all of the dominant genes found in the grandparents
9. The number of chromosomes found within the cells of any given species is a constant number maintained through multiple generations. The accumulation of chromosomes is prevented because the process of meiosis creates –
F haploid gamete cells H genetically identical daughter cells G mutations that destroy extra DNA J offspring through asexual reproduction
10. When fertilization occurs, the resulting zygote is a diploid cell containing two of every type of chromosome. This is because one of each type of chromosome is –
A mutated by ultraviolet radiation C contributed by both parents B deleted during the fertilization process D duplicated within sperm cells