The cause of testicular feminization syndrome is:
Correct answer: A. A recessive gene on X-chromosome
- A. A recessive gene on X-chromosome
- B. A recessive gene on Y-chromosome
- C. A dominant gene on X-chromosome
- D. A dominant gene on Y-chromosome
Explanation
The cause of testicular feminization syndrome (TFS) is a mutation in the androgen receptor gene. This gene is responsible for sending signals to the body's cells to respond to androgens. If the androgen receptor gene is mutated, the body's cells will not be able to respond to androgens, and the person will develop the features of TFS.The androgen receptor gene is located on the X chromosome. This means that TFS is an X-linked recessive disorder. This means that a person must inherit two copies of the mutated gene in order to have TFS. If a person inherits only one copy of the mutated gene, they will be a carrier of the disorder, but they will not show any symptoms.
Last updated
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.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
4 Mutations in opsin genes cause_ types of colorblindness.
9 : 3 : 3 : 1 ratio is given by:
A bald man marries to pattern bald woman. The chance of baldness in their daughter is:
A botanist sees that when he breeds a plant with blue flowers and a plant with red flowers, the resulting generation are plants with a 1:1 ratio of blue: red flowers. He knows that the two parents are homozygous for the trait of color. What phenomenon most likely explains the 1:1 ratio in the filial generation?
A carrier female for hemophilia can pass the defective allele to: