Moderate

Human male differs from human female in having:

Correct answer: A. One non-homologous pairs of chromosomes

  • A. One non-homologous pairs of chromosomes
  • B. 23 non-homologous pairs of chromosomes
  • C. 22 homologous pairs of chromosome
  • D. 23 homologous pairs of chromosome

Explanation

Sex chromosomes are also homologous in female (XX) whereas autosomes are homologous in both male and females. However in male sex chromosomes (XY) are non-homologous.

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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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