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Genetics Test Review Genetics Test Review 1. The gene for color blindness in humans is found on the X chromosome. A boy has a color blind father. Will the boy be color blind? Explain. 2. True or False: Crossing over results in genetic recombination. 3. A useful device for predicting the possible offspring of crosses between different genotypes is the _____. 4. In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r), and the allele for black fur (B) is dominant to the allele for white fur (b). If two guinea pigs that are heterozygous for rough, black fur are mated, A. What are the genotypes of the parents B.What is the phenotypic ratio of the offspring? Show your work in a Punnett square 5. Describe Mendel’s law of segregation and law of independent assortment. 6. Cells containing two alleles for each trait are called _______. 7. The gamete that contains genes contributed only by the mother is _____. 8. A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy? 9. A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, there would probably be _____. 10. Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called _____. 11. The type of inheritance shown when a redflowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is _____. 12. A trait controlled by four alleles is said to have _____. 13. The 23rd pair of chromosomes that differ in males and females are called _____. 14. Eye color in humans is the result of _____ inheritance. 15. A child is diagnosed with a rare genetic disease. Neither parent has the disease. How might the child have inherited the disorder? 16. Name some genetic disorders that can be found when karyotyping. 17. How does meiosis maintain a constant number of chromosomes in the body cells of organisms that reproduce sexually? 1. The gene for color blindness in humans is found on the X chromosome. A boy has a color blind father. Will the boy be color blind? Explain. 2. True or False: Crossing over results in genetic recombination. 3. A useful device for predicting the possible offspring of crosses between different genotypes is the _____. 4. In guinea pigs, the allele for rough coat (R) is dominant to the allele for smooth coat (r), and the allele for black fur (B) is dominant to the allele for white fur (b). If two guinea pigs that are heterozygous for rough, black fur are mated, A. What are the genotypes of the parents B.What is the phenotypic ratio of the offspring? Show your work in a Punnett square 5. Describe Mendel’s law of segregation and law of independent assortment. 6. Cells containing two alleles for each trait are called _______. 7. The gamete that contains genes contributed only by the mother is _____. 8. A couple has two children, both of whom are boys. What is the chance that the parents' next child will be a boy? 9. A female guinea pig homozygous dominant for black fur color is mated with a male homozygous for white fur color. In a litter of eight offspring, there would probably be _____. 10. Genes located on homologous chromosomes may have alternate forms that control different forms of a trait. These alternate forms of a gene are called _____. 11. The type of inheritance shown when a redflowering plant is crossed with a white-flowering plant and only pink-flowering plants are produced is _____. 12. A trait controlled by four alleles is said to have _____. 13. The 23rd pair of chromosomes that differ in males and females are called _____. 14. Eye color in humans is the result of _____ inheritance. 15. A child is diagnosed with a rare genetic disease. Neither parent has the disease. How might the child have inherited the disorder? 16. Name some genetic disorders that can be found when karyotyping. 17. How does meiosis maintain a constant number of chromosomes in the body cells of organisms that reproduce sexually? STUDY YOUR GLOSSAY TOO!!!! STUDY YOUR GLOSSAY TOO!!!!