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- 1. Multiple Choice
Which are different forms of the same gene?
genotypes
phenotypes
alleles
traits
- 2. Multiple Choice
Which describes the law of segregation?
a gamete contains the father's allele
the gametes produced each have 1 allele after meiosis II
a gamete produced has 2 of the same alleles after meiosis II
the gamete fertilized has the dominant trait
- 3. Multiple Choice
A plant that has round and yellow seeds (RrYy) is crossed with a plant that has round and yellow seeds (RrYy). What is the ratio of the offspring that will have round and yellow seeds?
Key: R = round
r = wrinkled
Y = yellow
y = green
1:16
3:16
8:16
9:16
- 4. Multiple Choice
The diagram represents a dihybrid cross between two pea plants heterozygous for both seed color and seed shape. What is the phenotypic ratio of the offspring?
1:1:1:1:2:2:2:2:4
1:3:3:9
1:4
4:12
- 5. Multiple Choice
Pea plants can have yellow seeds or green seeds. Which conclusion about the meaning of Y is correct if the allele combination Yy is for yellow seeds?
yellow and dominant
green and recessie
yellow and recessive
green and dominant
- 6. Multiple Choice
Unattached earlobes is a dominant trait, E. A parent who is homozygous for unattached earlobes is crossed with a parent who is homozygous for attached earlobes. Which describes the genotypes of their offspring?
100% Ee
100% unattached earlobes
100% ee
100% attached earlobes
- 7. Multiple Choice
Which Punnett square represents a cross between two parents that are heterozygous for purple flowers?
- 8. Multiple Choice
What does the notation Rr mean to geneticists?
heterozygous alleles
homozygous alleles
dominant alleles
recessive alleles
- 9. Multiple Choice
Each kernel of corn on a single ear can inherit a different set of alleles from those inherited by other kernels. This characteristic makes corn a useful example of which law or principle?
principle of dominance
law of independent assortment
law of segregation
law of genetics
- 10. Multiple Choice
Which type of scientific statement is defined as a statement of fact that is generally accepted to be true and universal because it has always been observed to be true?
theory
probability
law
hypothesis
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