Meiosis

A condition that occurs in males when they have an extra X chromosome. It results in the presence of one extra copy of the X chromosome in each cell (XXY).

• Klienfelter's Syndrome

• Down's Syndrome

• Turner's Syndrome

• Spermatogenesis syndrome

Cells that contain one copy of a chromosome, half the normal amount of chromosomes.

• tetrad

• diploid

• haploid

• meiosis

Identical halves of a duplicated chromosome that are joined together at the centromere.

• diploid

• somatic cells

• homologous chromosomes

• sister chromatids

Smaller cells that contain little more than DNA and are eventually broken down and destroyed. They are produced during oogenesis and result in one large egg cell that is kept.

• sister chromatids

• polar bodies

• autosomes

• gametes

The pair of chromosomes that control the sex of the organism.

• homologous chromosomes

• autosomes

• sex chromosomes

• fertilization

A picture of chromosomes in a cell. It is used to show chromosomal disorders.

• non-disjunction

• karyotype

• polar bodies

• tetrad

The process that divides a diploid cell into a haploid cell. Your germ cells undergo this process.

• mitosis

• meiosis

• crossing over

• fertilization

The process that occurs when homologous chromosomes cross and exchange genes.

• sex chromosomes

• tetrad

• crossing over

• meiosis

This occurs when sperm and egg combine.

• fertilization

• crossing over

• meiosis

• mitosis

A condition that only affects females, results when one of the X chromosomes (sex chromosomes) is missing or partially missing

• Down's syndrome

• Klinefelter's Syndrome

• Turner's syndrome

• Non-disjunction syndrome