Assuming these genes are not linked and assort independently, from the parental genotype P1 ggww, four gametes gw will be produced.
GERM CELLS
Germ cells divide by mitosis and meiosis.
- Through mitosis, they originate more germ cells.
- Through meiosis, they give place to haploid gametes, called sperm and egg cells. This process is known as gametogenesis.
MEIOSIS
Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n).
Each daughter cell is haploid because they have half the number of chromosomes of the original one.
Meiosis is completed in two phases.
- A first reductive phase, after replication,
- A second not-reductive phase.
Gamete formation involves the random and independent segregation of the alleles.
During anaphase I (meiosis) occurs the independent separation of homologous chromosomes that migrate to opposite poles of the cell.
This separation generates different chromosomal combinations in the daughter cells.
There are two alternatives per homologous pair.
The number of gametes with different combinations is 2ⁿ, where n = number of homologous pairs.
In the exposed example, assuming that these genes are not linked -they are placed in different chromosomes- and assort independently from each other, the four possible gametes would be gw.
Allele combination is as follows
Parental) ggww
Gametes) gw, gw, gw, gw
For a better understanding, you can see the image in the attached files.
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