Sex Determination

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Sex determination is the biological process by which an individual develops as male or female. It is primarily determined at fertilization by the type of sex chromosomes inherited. For example, in hum…

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Allosomes, also known as sex chromosomes, are the pair of chromosomes that determine the sex of an individual. In humans, these are the X and Y chromosomes. For example, females have XX and males have…

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Autosomes, or somatic chromosomes, are all the chromosomes other than the sex chromosomes. They carry genes responsible for general body characteristics and functions. Humans have 22 pairs of autosome…

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Homogametic refers to individuals that produce gametes with the same type of sex chromosome. Typically, females are homogametic. For example, in humans, females (XX) produce only X-bearing eggs.

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Heterogametic refers to individuals that produce two types of gametes with different sex chromosomes. Typically, males are heterogametic. For example, in humans, males (XY) produce sperm with either X…

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In the XX-XO system, females have two X chromosomes (XX), while males have only one X chromosome (XO). This system is found in grasshoppers, bugs, and cockroaches. Males produce two types of sperm: ha…

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In the XX-XY system, females are XX (homogametic) and males are XY (heterogametic). This system is found in humans and Drosophila. Male gametes are of two types: X-bearing and Y-bearing. Fertilization…

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In the ZW-ZZ system, females are heterogametic (ZW) and males are homogametic (ZZ). This system is found in birds, reptiles, and some fishes. Female gametes carry either Z or W, while male gametes car…