Genetics Tips – Lesson 5: Meiosis

5.1 Meiosis Defined

Meiosis produces gametes (egg and sperm cells).

During meiosis, hereditary info is exchanged involving the maternally and paternally inherited copies of a set of chromosomes to be able to produce brand brand new combinations of genes. This technique of hereditary recombination really helps to increase variability that is genetic a species. It permits when it comes to transmission of practically limitless combinations of genes from parent to offspring.

The ensuing gametes have actually 23 brand new chromosomes, one person in each one of the 23 pairs, representing unique combinations associated with the original maternal and paternal copies.

5.2 Meiosis Terminology—Homolog

Homologous chromosomes , or homologs, comprise associated with people of any offered chromosome set. One person in the homolog may be the chromosome through the mom additionally the other user is through the dad.

During meiosis, homologs pair together.

5.3 Meiosis Terminology—Chromatid

A chromatid is created during meiosis and it is certainly one of two identical DNA strands formed after DNA synthesis.

Sibling chromatids are through the chromosome that is same and they’re linked together at the centromere.

The classic drawing of a chromosome shaped such as the page X really illustrates sibling chromatids.

5.4 The 2 Elements Of Meiosis—Meiosis I

Meiosis is divided in to two components: meiosis we and meiosis II .

In meiosis We, each chromosome in a mobile is replicated to produce replicated sis chromatides for each person in the chromosomes that are homologous.