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Genetics Practice DO NOT write on this sheet. Copy the problems in your notebook and answer them. This will help you study for your test on Wednesday. 1. Hereditary information is contained in the a. cell membrane b. cytoplasm c. mitochondria d. nucleus 2. A single unit of genetic information is called a. a chromosome b. a gene c. a nucleus d. DNA 3. Genetically, how do offspring of asexual reproduction compare to their parent(s)? a. similar b. identical c. very different d. no similarities 4. Each human cell contains the genes for how many traits? a. one b. two c. hundreds 5. An organism with two identical genes for a trait is said to be a. dominant b. recessive c. hybrid d. thousands d. purebred 6. In sexual reproduction, how much genetic information does the offspring receive from each parent? a. none b. ¼ c. ½ d. 2 sets 7. Which of the following gene pairs would show the recessive trait? a. Gg b. gg c. GG d. none 8. In screech owls, red feathers are dominant over gray feathers. If two heterozygous owls were mated, what percentage of offspring would be expected to have red feathers? a. 25% b. 50% c. 75% d. 100% 9. In a certain species of army ant, the gene for long jaws (M) is dominant over the gene for short jaws (m). If a biologist wanted to produce ants with long jaws ONLY, which ants should be crossed? a. Mm X Mm b. Mm X mm c. MM X Mm d. mm X mm 10. The basic principles of genetics were established in the 19th century by a. Francis Crick b. James Watson c. Robert Hooke d. Gregor Mendel 11. ______ chromosomes are found in a normal body cell compared to the _____ chromosomes that are found in sex cells (egg and sperm). 12. A female has the genotype ___ ___. A male has the genotype ___ ___. The __________ determines the gender of the child