Heredity B/Designer Genes C

[moonwax]

1. In which phase of meiosis do cells first become haploid?
2. What is the difference between pyrimidines and purines?
3. What is overdominance?

[EwwPhysics]

1. In which phase of meiosis do cells first become haploid?
2. What is the difference between pyrimidines and purines?
3. What is overdominance?

1.

Click to Show Answer

I guess telophase II? They don't become separate haploid cells until cytokinesis has occurred, I don't know if they would be considered haploid during anaphase II, when the chromosomes have split but they're still in the same cell technically...

2.

Click to Show Answer

Purines are bigger because they have 4 nitrogen atoms while pyrimidines only have 2.

3.

Click to Show Answer

Overdominance is when heterozygous individuals have a higher fitness than homozygous individuals.

[moonwax]

1. In which phase of meiosis do cells first become haploid?
2. What is the difference between pyrimidines and purines?
3. What is overdominance?

1.

Click to Show Answer

I guess telophase II? They don't become separate haploid cells until cytokinesis has occurred, I don't know if they would be considered haploid during anaphase II, when the chromosomes have split but they're still in the same cell technically...

2.

Click to Show Answer

Purines are bigger because they have 4 nitrogen atoms while pyrimidines only have 2.

3.

Click to Show Answer

Overdominance is when heterozygous individuals have a higher fitness than homozygous individuals.

1. Gahhh, okay, next time I really should think more before giving questions... I believe the answer is cytokinesis in meiosis I? I don’t know, but my reasoning is that after meiosis I each cell has only one form of genetic information, just duplicated. I can’t find any definition of haploid on the web besides “half the usual number of chromosomes” or “single set of chromosomes,” though, so this question is kind of tricky... sorry. Here’s the link to a Khan Academy article on meiosis, which I was reading before posting this, but I don’t know... https://www.khanacademy.org/science/bio ... of-meiosis The rest are definitely correct, though! (And I’m probably just wrong on the first question...)

[EwwPhysics]

hmmm it just depends on the definition of haploid.


1. What is the Rh factor?
2. How can Rh incompatibility affect pregnancy?

3. What are the loops of DNA in prokaryotes called?

4. What are the roles of untranslated regions of mRNA?

[MoMoney$$$;)0)]

hmmm it just depends on the definition of haploid.


1. What is the Rh factor?
2. How can Rh incompatibility affect pregnancy?

3. What are the loops of DNA in prokaryotes called?

4. What are the roles of untranslated regions of mRNA?

It's essentially pH, if it's too high it's bad for you, ChRoMoSoMeS (jKjK), to bE uSeD aS TrNa

[MoMoney$$$;)0)]

hmmm it just depends on the definition of haploid.


1. What is the Rh factor?
2. How can Rh incompatibility affect pregnancy?

3. What are the loops of DNA in prokaryotes called?

4. What are the roles of untranslated regions of mRNA?

It's essentially pH, if it's too high it's bad for you, ChRoMoSoMeS (jKjK), to bE uSeD aS TrNa

aLL coRrEcT

[EwwPhysics]

I'd like to apologize for MoMoney$$$;)0) and I's joking around, that's probably what led to inactivity on this thread.
Remember that those questions still have to be answered!

[Phenakism]

Oh lmao ok
1.Rh factor is the different blood type system where the positive genotype adds a new rh antigen to your red blood cells. \
2. If the baby and the mother have different rh factors, the mom negative and the baby positive, the mom's antibodies end up attacking the baby and cause anemia. 3. Plasmids? 4. Like the 5'end 3' poly-A tail? The 5' cap helps with ribosome interconnecting and both protect from enzymic degradation

[EwwPhysics]

Oh lmao ok
1.Rh factor is the different blood type system where the positive genotype adds a new rh antigen to your red blood cells. \
2. If the baby and the mother have different rh factors, the mom negative and the baby positive, the mom's antibodies end up attacking the baby and cause anemia. 3. Plasmids? 4. Like the 5'end 3' poly-A tail? The 5' cap helps with ribosome interconnecting and both protect from enzymic degradation

All correct, but for 4 I said They help with mRNA stability (i.e. protection from ribonucleases which degrade), localization, and translational efficiency, you were basically right, I was talking about the regions before the start codon and after the stop codon, and I guess the 5' cap and poly-A tail would be included in that
Your turn!

[reninkidney]

1. What are the levels of DNA compaction?

2. How does prokaryotic DNA differ from eukaryotic DNA?

3. What is the spindle checkpoint?