The sex of a human being is determined by the pair of sex chromosomes they inherit from their parents. Humans have 23 pairs of chromosomes, one of which is the sex chromosome pair.

1. If a sperm carrying an X chromosome fertilizes an egg (which always carries an X chromosome), the resulting XX pair means the baby will be a girl.

2. If a sperm carrying a Y chromosome fertilizes the egg, the resulting XY pair means the baby will be a boy.

So, the presence of a Y chromosome determines male sex. Without a Y chromosome, the individual is female.

Question

The sex of a human being is determined by the pair of sex chromosomes they inherit from their parents. Humans have 23 pairs of chromosomes, one of which is the sex chromosome pair.

1. If a sperm carrying an X chromosome fertilizes an egg (which always carries an X chromosome), the resulting XX pair means the baby will be a girl.

2. If a sperm carrying a Y chromosome fertilizes the egg, the resulting XY pair means the baby will be a boy.

So, the presence of a Y chromosome determines male sex. Without a Y chromosome, the individual is female.

Knowee AI · Accepted Answer

The sex of a human being is determined by the pair of sex chromosomes they inherit from their parents. Humans have 23 pairs of chromosomes, one of which is the sex chromosome pair.

1. If a sperm carrying an X chromosome fertilizes an egg (which always carries an X chromosome), the resulting XX pair means the baby will be a girl.

2. If a sperm carrying a Y chromosome fertilizes the egg, the resulting XY pair means the baby will be a boy.

So, the presence of a Y chromosome determines male sex. Without a Y chromosome, the individual is female.

What is the chromosome for boy or girl?

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