Download 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. A useful device for predicting the possible offspring of crosses between
different genotypes is the _____.
3. 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
4. Describe Mendel’s law of segregation and law of independent assortment.
5. Cells containing two alleles for each trait are called _______.
6. Name the gamete that contains genes contributed only by the mother.
Name the two possible gametes that can contain genes contributed by the
father.
7. A couple has two children, both of whom are boys. What is the chance
that the parents' next child will be a boy?
8. 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 _____.
9. Genes located on homologous chromosomes may have alternate forms
that control different forms of a trait. These alternate forms of a gene are
called _____.
10. The type of inheritance shown when a red-flowering plant is crossed
with a white-flowering plant and only pink-flowering plants are produced is
_____.
11. The 23rd pair of chromosomes that differ in males and females are called
_____.
12. A child is diagnosed with a rare genetic disease. Neither parent has the
disease. How might the child have inherited the disorder?
13. How does meiosis maintain a constant number of chromosomes in the
body cells of organisms that reproduce sexually?
14. What is produced by meiosis? How is this product different in mitosis?
15. Describe the process of fertilization and name the type of cell produced.
16. List the differences between somatic cells and gamete cells.
17. What is the genotypic ratio for a monohybrid cross between two
heterozygous parents?