4 Mutations in opsin genes cause_ types of colorblindness.
Correct answer: C. Three
- A. One
- B. Two
- C. Three
- D. Four
Explanation
There are three types of opsins in the cone cells of our eyes which are associated with normal trichromatic vision. These three types of opsins are controlled by three different types of genes. Thus mutation in these three genes can cause three types of color blindness.
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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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