Humans have:
Correct answer: A. 46 chromosomes
- A. 46 chromosomes
- B. 46 pairs of chromosomes
- C. 23 chromosomes
- D. 22 pairs of chromosomes
Explanation
Humans have a total of 46 chromosomes, which are organized into 23 pairs. This includes 22 pairs of autosomes and 1 pair of sex chromosomes, making up the complete set of 46. Option A is correct because it accurately reflects the total number of chromosomes. Option B is incorrect because it duplicates the number of pairs rather than the total number. Option C is incorrect as it only accounts for half of the total chromosomes (one from each pair). Option D is incorrect because it underestimates the total number of pairs by one.
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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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