A version of a gene is called a(n) (1 point)
gamete.
phenotype.
allele.
genotype.
allele.
The trait for blue eyes in humans is caused by a recessive allele. If this gene is named e, what is the genotype of a blue-eyed person?
(1 point)
Ee
ee
E
EE
ee
Describe the relationships among genes, DNA, and traits. (1 point)
Genes code for traits, which are composed of DNA.
Traits are determined by genes, which are composed of DNA.
Traits are made of genes, which are composed of DNA.
Traits determine the DNA in genes.
Traits are determined by genes, which are composed of DNA.
In mice, the gene for tail length has two alleles. A long tail is dominant to a short tail. If a long-tailed mouse that is heterozygous mates with a short-tailed mouse, what are the chances of having offspring with short tails? (1 point)
100%
50%
25%
75%
The chances of having offspring with short tails is 50%.
What is meant by a phenotype ratio in a Punnett square? (1 point)
the number of alleles in possible offspring
the number of genes that are possible in offspring
the fraction of possible offspring that contain a certain allele in their genes
the fraction of possible offspring that can be observed to have a trait