1. A version of a gene is called a karyotype.
autosome.
allele.
phenotype.
2. If a father has a dominant X-linked disease and the mother does not, which children can inherit the disease?
only males
both males and females
only females
neither male nor female
3. If a mother has a dominant X-linked disease and the father does not, which children can inherit the disease?
neither male nor female
only males
only females
both males and females
4. How can a woman inherit red-green color blindness?
His mother is a carrier and his father has it.
Females cannot inherit red-green color blindness.
His mother is not a carrier and his father has it.
His mother is a carrier and his father does not have the disease.
5. A purebred tall pea plant is cross-pollinated with a heterozygous tall pea plant. Use a Punnett square to determine the probability that the offspring will inherit a recessive short allele.
25%
0%
75%
50% 1. A version of a gene is called a?
(A. allele)
2. The blue eye trait in humans is caused by a recessive allele. If this gene is called E, what is the genotype of a person with blue eyes?
(2.D.ee)
3. Describe the relationships between genes, DNA and traits.
(A. Traits are determined by genes, which are made up of DNA.)
4. In mice, the tail length gene has two alleles. A long tail is dominant to a short tail. If a heterozygous long-tailed mouse mates with a short-tailed mouse, what are the chances of having short-tailed offspring?
(D.50%)
5.What is meant by phenotype ratio in a Punnett square? What is meant by phenotype ratio in a Punnett square?
(C. the fraction of possible offspring that can be observed to have a trait.) 1. allele
2. ee
3. Traits are determined by genes, which are made up of DNA.
4. 50%
5. the fraction of possible offspring that can be observed to have a trait
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