Download Genetics Review Quiz

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Genetics Review Quiz
In cats, the gene for white fur (W) is dominant to all other coat colors (w).
1. If a heterozygous white cat is mated to an orange tabby, what are the genotype and phenotype probabilities
for their offspring? Show a punnett square.
Genotypes and probabilities:
Phenotypes and probabilities:
2. What are the genotype and phenotype probabilities of the offspring if two heterozygous cats are mated?
Genotypes and probabilities:
Phenotypes and probabilities:
3. Blood Types:
a. What are the four main blood types? _____, _____, _____, _____
b. Which gene is recessive? _____
c. If you are heterozygous for Type B, what two letters would be in your genotype? _____ _____
d. Is it possible for a mom with Type A and a dad with Type B to have a child with Type O? Explain.
4. Sex-Linked Problems:
a. Men and women differ genetically only in their sex chromosomes.
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Men = _____ _____; Women = _____ _____
b. Sex-Linked traits are typically carried on which chromosome? _____
c. Who is more likely to inherit a sex-linked trait, men or women? Explain.
d. Name two sex-linked traits: ____________________________, ____________________________
5. How are children with Down’s Syndrome genetically different from other children?
6. If a flower receives a dominant RED color gene from one parent, and a dominant WHITE color gene from
another, its genotype will be heterozygous. If the flower shows INCOMPLETE dominance, what color will
it be? Explain.
7. Germ / Somatic (circle one) are body cells. Germ / Somatic (circle one) cell mutations are passed on to
offspring.
8. Pedigrees:
a. What shape are women in a pedigree? _________
b. If this pedigree is for a recessive disorder (N= normal; n= disorder), what is the genotype for:
•
I-1: ________
•
II-2: ________
•
III-2: ________
•
II-1: ________
•
III-1: ________
c. Could this be a pedigree for a sex-linked trait? ___________