Asked in FBISE Biology 2022 — Paper 1 2022

A trait whose alleles are present in both male and female but expresses more in one sex than other

Correct answer: B. Sex-influenced trait

  • A. Sex-linked trait
  • B. Sex-influenced trait
  • C. Sex-limited trait
  • D. Y-linked trait

Explanation

Sex-linked, as related to genetics, refers to characteristics (or traits) that are influenced by genes carried on the sex chromosomes. In humans, the term often refers to traits or disorders influenced by genes on the X chromosome, as it contains many more genes than the smaller Y chromosome.

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About Mendel's Laws of Inheritance

Mendelian inheritance explains how alleles separate into gametes and assort during reproduction, producing predictable genotype and phenotype ratios. Questions cover dominance, recessiveness, homozygous and heterozygous conditions, the laws of segregation and independent assortment, monohybrid and dihybrid crosses, test crosses and the limits caused by linked genes.

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