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Which of the following is a
a. Aa
b. red hair
c. Heterozygous
d. DNA
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- Baldness is a phenomenon where individuals lose hair as they grow older. As an X-linked recessive gene, what instances do females manifest this trait? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantPolydactyly is a congenital physical anomaly in in humans, dogs, cats; and having supernumerary fingers or toes. If it is an autosomal dominant trait, when is a genotype of a person that shows normal phenotype? a. heterozygous recessive b. heterozygous dominant c. homozygous recessive d. homozygous dominantColorblindness is a recessive x-linked trait. Which genotype represents a male with normal vision? a. XNXN b. XYN c. XnY d. XNY
- When a trait is only expressed in the presence of two identical alleles, the genotype is a. Heterozygous dominant b. Homozygous dominant c. Homozygous recessive d. Heterozygous recessiveA is a dominant gene for normal pigment, and a is its recessive allele for albinism (and pink eyes). B is a dominant gene for brown eyes, and b is its recessive allele (blue). What is the mother's genotype if two brown-eyed parents have fraternal twins, one with blue eyes and one with pink eyes (albino)? a. AaBb b. AaBB c. aaBb d. aabb e. AABBWhen a trait is only expressed in the presence of two identical alleles, the genotype is Select one: a. Heterozygous dominant b. Heterozygous recessive c. Homozygous dominant d. Homozygous recessive
- An individual with two different alleles at a locus is a(n) Group of answer choices A. clone B. hemizygote C. homozygote D.heterozygoteWhich of the following does not have an environmental factor thataffects the distribution of the phenotype? a. phenylketonuria c. heightb. skin color d. Marfan syndromeTwo albino parents have four unaffected children. If albinism in the parents is given by mutations on two different genes (A and B) and complementation is observed in all four children, what are the genotypes of the parents? A. AaBb and AABB B. AABb and AaBB C. both parents are AaBb D. AAbb and BBaa
- A person is heterozygous for ear shape. Ear lobes are dominant to no ear lobes. Which would be a correct way to write their genotype? a.Tt b.EE c.ear lobes d.ee e.no ear lobesAn animal has a genotype of two uppercase letters, such as AA. What is this type of genotype called? A. Homozygous Recessive O B. Homozygous Dominant C. Heterozygous Dominant O D. Heterozygous RecessiveWhich of the following is a homozygous representation? O a. Bb O b. Aa O C. xHxh Od.aa