The traits that show autosomal inheritance are:
Correct answer: A. Equal probabilities exist in both male and female individuals.
- A. Equal probabilities exist in both male and female individuals.
- B. Different probabilities in male and female individuals
- C. More probabilities in male than female individuals
- D. More probabilities in female than male individuals
Explanation
Option A is correct as Autosomal inheritance refers to the inheritance of a gene located on one of the 22 pairs of non-sex chromosomes in the human genome. When a gene is located on an autosome, it can be inherited in one of two ways: dominant or recessive. In dominant inheritance, only one copy of the mutated gene is required to express the trait or disorder. This means that if a parent carries the mutated gene, there is a 50% chance with each pregnancy that the child will inherit the mutation and therefore express the trait or disorder. Examples of autosomal dominant disorders include Huntington's disease and achondroplasia. In recessive inheritance, two copies of the mutated gene are required to express the trait or disorder. This means that if both parents are carriers of the mutated gene, there is a 25% chance with each pregnancy that their child will inherit two copies of the mutated gene and therefore develop the condition. Examples of autosomal recessive disorders include cystic fibrosis and sickle cell anemia.
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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.
Practise Inheritance
1,238 free Inheritance MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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