Download Genetics Review Fall 07`

Genetics Review
1. Define the following Genetics terms and give an example of each:
Autosomes
Sex chromosomes
Fertilization
Gametes
Somatic Cell
Diploid
Haploid
Dominant Allele
Recessive Allele
Heterozygous allele
Homozygous allele
Law of segregation
Law of Independent Assortment
Phenotype
Genotype
Polygenic Inheritance
Incomplete Dominance Inheritance
Complete Dominance (Monohybrid) Inheritance
Karyotype
Sex linked disorder
Homologous chromosomes
Sister Chromatids
2. How many chromosomes come from each parent?
3. What is a karyotype and what does it show? Give 3 examples of Disorders that can
be detected from a karyotype.
4. What is the purpose of meiosis? Use the following terms from the vocab above:
haploid, diploid, gamete and fertilization.
5. What is Crossing Over? When does it occur? Why is it important?
6. How is meiosis different than mitosis?
7. What is the probability that a cross between a homozygous recessive parent and a
heterozygous parent will produce homozygous recessive offspring?
8. What does it mean when we say a person is a carrier of a disease? What is their
genotype?
9. Why are sex linked traits more common among males?
10. Why can females only be carriers of sex-linked recessive traits?
11. Two parents have the genotype Ll for a genetic disorder caused by a dominant
allele. What is the chance that their children will inherit the disorder?
12. A female is born with dimples, which is a recessive phenotype. Using the letter “d” to
represent dimples, what are all the possible genotypes of her parents?