Select the incorrect statement from the following:
Correct answer: C. Baldness is a sex-limited trait
- A. Galactosemia is an inborn error of metabolism
- B. Small population size results in random genetic drift in a population
- C. Baldness is a sex-limited trait
- D. Linkage is an exception to the principle of independent assortment in heredity
Explanation
Baldness is a sex-influenced trait. The dominance of alleles may differ in heterozygotes of the two sexes. This phenomenon is called "sex-influenced dominance". Gene products of heterozygotes in the two sexes may be influenced differentially by sex hormones.
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About Inheritance
Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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