Which of the following is not correct about sex-linked traits?

✅Explanation:
-Sex-linked traits are indeed more frequently expressed in one sex compared to the other, often due to the difference in the number of X chromosomes between males (one X) and females (two X). For example, red-green color blindness is a recessive sex-linked trait, leading to higher expression in males.
-Sex-influenced traits, while showing differences in expression between sexes, are primarily influenced by sex hormones interacting with genes on autosomes (non-sex chromosomes). Examples include beard growth in males triggered by testosterone or increased voice pitch in females due to estrogen.
-As mentioned in B, genes responsible for sex-influenced traits are indeed located on autosomes. They are not directly linked to the sex chromosomes but interact with sex hormones for their differential expression.
-Haemophilia is a classic example of a sex-linked recessive trait, carried on the X chromosome. Males, having only one X, exhibit the disease if they inherit the recessive allele, while females with two X chromosomes typically only show symptoms if they inherit two recessive alleles (rare). It's crucial not to confuse sex-linked and sex-influenced traits based on their expression patterns in different sexes.

🔴Related Terminologies::
-Sex-linked traits: Characteristics influenced by genes located on sex chromosomes (X and Y).
-Sex-influenced traits: Characteristics showing different expression patterns between sexes due to the influence of sex hormones on genes located on autosomes.
-Autosomes: Non-sex chromosomes.
-Haemophilia: A genetic disorder causing impaired blood clotting, primarily affecting males due to its sex-linked inheritance pattern.