The given diagram shows a mutation in a single gene of β-globin of hemoglobin affecting multiple organs that causes different health issues. Based on the effects shown, the beta-globin gene is categorized as a/an:
Correct answer: C. Pleiotropic gene
- A. Epistatic gene
- B. Recessive gene
- C. Pleiotropic gene
- D. Hypostatic gene
Explanation
C is the correct option.A mutation in a single gene (β-globin) affecting multiple organs and causing different health issues is an example of pleiotropy.Pleiotropy occurs when one gene influences multiple, seemingly unrelated phenotypic traits.A option is incorrect because epistatic gene → affects the expression of another gene.B option is incorrect because recessive/dominant describes allele expression, not the number of traits affected.D option is incorrect because hypostatic gene is the gene whose expression is masked or suppressed by an epistatic gene at a different locus.
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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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