Why is it that human males and females who are both heterozygous for the pattern-baldness gene have different phenotypes (males are bald, females are not bald)?

What will be an ideal response?


Pattern baldness is an example of a sex-influenced trait. Males and females do not express the gene in the same way. Pattern baldness is controlled by an autosomal gene that acts as a dominant in males and as a recessive in females. The b/b genotype results in baldness in both sexes, the b+/b+ phenotype results in nonbaldness for both sexes, and the b+/b genotype results in baldness in males but nonbaldness in females.

Biology & Microbiology

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Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes). Among the halophiles, mannitol fermenters release acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol fermenter, a nonhalophilic mannitol fermenter, and a halophilic mannitol nonfermenter. Thus, the medium is acting as a ________ medium.

A. differential B. selective C. selective and differential D. neither selective nor differential

Biology & Microbiology

Which of the following is not an

environmental cue for plants? a. Length of night. b. Temperature. c. Earth’s magnetic field. d. Presence of pathogens. e. Gravity.

Biology & Microbiology

What is the basis of Mendel's laws?

A) the behavior of chromosomes during prophase I of meiosis only B) the behavior of chromosomes during mitotic anaphase C) the behavior of chromosomes during prophase I and prophase II of meiosis D) the behavior of chromosomes during metaphase I and anaphase I of meiosis

Biology & Microbiology

If protein was the genetic material, where in the Hershey and Chase experiment would you expect to find radioactivity when phage contained 35S-labelled protein?

a. in the bacterial cell b. in the phage progeny c. in the phage spikes d. in the phage coat

Biology & Microbiology