Ella and Olivia’s Health Part C: Fertilization
Ella wonders, Just how “identical” are we?
Let’s start with the process of fertilization…
- Meiosis is the same as Mitosis, but it is cell division specific to the sex cells of an organism.
- A Gamete is a Haploid Cell.
- Mother or Father- Haploid cell with a Single set of Chromosomes 23.
- Mother and Father- Zygote/Diploid cell with a Double set of Chromosomes 46.
Fertilization Overview
Part 1
- Haploid oocyte cell exits the ovary and enters the Fallopian tube
- After intercourse, the haploid sperm cell enter the cervix and travel across the Fallopian tube to fertilize an Oocyte
- The fertilized egg (zygote) travels to the uterus to grow the fetus in the uterine lining as pregnancy progresses
Part 2
A Human has 46 Chromosomes and they are primarily Diploid cells
- Oocyte provides 22 Autosomal, and 1 Sex chromosome = 23 Haploid cells (X)
- Sperm provides 22 Autosomal, and 1 Sex chromosome = 23 Haploid cells (X or Y)
- This is necessary for fertilization and fetal development to occur
In an oocyte, a layer of granulosa cells that surrounds the oocyte and that must be penetrated by sperm before fertilization can occur
Part 3
Genetics of Fraternal vs Identical Twins
Here is a quick video explaining the difference between Identical and Fraternal Twins fertilization process.
