Someone justify this Bio section

[zEkii]

---

Members don't see this ad.

So, let me know if I am right or wrong.

23 pairs of chromosomes= 46 chromosomes= 92 chromatids (Mitosis)

23 pairs of chromosomes= 46 chromosomes=92 chromatids -->After Meiosis 1--> 23 chromosomes=46 chromatids.

Now... Tetrads.
if there is 2n=46. Does this mean that in a diploid cell, there is 46 chromosomes, thus 23 tetrads?
And if there was an equation like n=8. Does that mean in a haploid cell there is 8 chromosomes, meaning 4 tetrads?

Thanks, I know its basic, but I need to remember it before my exam haha

 

[DetermineDent]

Pretty sure you're spot on.

 

[DAT Destroyer]

So, let me know if I am right or wrong.

23 pairs of chromosomes= 46 chromosomes= 92 chromatids (Mitosis)

23 pairs of chromosomes= 46 chromosomes=92 chromatids -->After Meiosis 1--> 23 chromosomes=46 chromatids.

Now... Tetrads.
if there is 2n=46. Does this mean that in a diploid cell, there is 46 chromosomes, thus 23 tetrads?
And if there was an equation like n=8. Does that mean in a haploid cell there is 8 chromosomes, meaning 4 tetrads?

Thanks, I know its basic, but I need to remember it before my exam haha

You are almost correct. If a diploid cell has 46 chromosomes, then during Meiosis 1 it will have 23 Tetrads. However, if a DIPLOID cell has 8 chromosomes, than, during Meiosis 1 it will have 4 Tetrads, because Homologous chromosomes will pair.

However, if the haploid number is 8, it cannot give you 4 tetrads.

Hope this helps.