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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
Heterogamesis is:
  • A
    Formation of two types of gametes
  • B
    Morphological distinction of male and female gametes
  • C
    Formation of two types of gametes by one sex and one type by other sex
  • D
    Formation of two types of gametes by both the sexes
✓

Answer

  1. Formation of two types of gametes by one sex and one type by other sex

Explanation:

Heterogamesis: forming two kinds of gametes of which one produces male offspring and the other female offspring. Heterogametic sex (digametic sex) refers to the sex of a species in which the sex chromosomes are not the same. For example, in humans, males, with an X and a Y sex chromosome, would be referred to as the heterogametic sex, and females having two X sex chromosomes would be referred to as the homogametic sex.

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