A version of a gene is called an allele.
A version of a gene is called a(n)(1 point) Responses phenotype. phenotype. gamete. gamete. genotype. genotype. allele.
9 answers
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) Responses E E ee ee EE EE Ee
The genotype of a blue-eyed person, who has the trait caused by a recessive allele (e), would be ee.
Describe the relationships among genes, DNA, and traits.(1 point) Responses Traits determine the DNA in genes. Traits determine the DNA in genes. Traits are determined by genes, 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 are made of genes, which are composed of DNA. Genes code for traits, which are composed of DNA.
The correct response is: 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) Responses 25% 25% 75% 75% 50% 50% 100% 100%
If a long-tailed mouse that is heterozygous (genotype Ll, where L is the dominant allele for long tail and l is the recessive allele for short tail) mates with a short-tailed mouse (genotype ll), the possible offspring genotypes are:
- From the heterozygous parent (Ll), the offspring can receive either L or l.
- From the short-tailed parent (ll), the offspring can only receive l.
The Punnett square for this cross would look like this:
L l
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l | Ll | ll |
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l | Ll | ll |
The offspring genotypes would be:
- 50% Ll (long-tailed)
- 50% ll (short-tailed)
Therefore, the chances of having offspring with short tails is 50%.
What is meant by a phenotype ratio in a Punnett square?(1 point) Responses the number of alleles in possible offspring the number of alleles in possible offspring the fraction of possible offspring that contain a certain allele in their genes the fraction of possible offspring that contain a certain allele in their genes the number of genes that are possible in offspring the number of genes that are possible in offspring the fraction of possible offspring that can be observed to have a trait
The correct response is: the fraction of possible offspring that can be observed to have a trait.
1 answer