Genetics Principles – 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 couple of chromosomes to be able to produce brand brand new combinations of genes. This procedure of genetic recombination really helps to increase variability that is genetic a species. It allows when it comes to transmission of practically limitless combinations of genes from moms and dad to offspring.
The ensuing gametes have actually 23 brand brand new chromosomes, one person in each one of the 23 pairs, representing unique combinations regarding the original maternal and paternal copies.
5.2 Meiosis Terminology—Homolog
Homologous chromosomes , or homologs, comprise of this users of any offered chromosome set. One person in the homolog may be the chromosome through the mom while the other member is through the daddy.
During meiosis, homologs pair together.
5.3 Meiosis Terminology—Chromatid
A chromatid is made 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 during the centromere. 继续阅读In humans, just what determines the intercourse of offspring and just why?