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10 questions
Which are different forms of the same gene?
genotypes
phenotypes
alleles
traits
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
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
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
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
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
Which Punnett square represents a cross between two parents that are heterozygous for purple flowers?
What does the notation Rr mean to geneticists?
heterozygous alleles
homozygous alleles
dominant alleles
recessive alleles
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
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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