BIO 322 – FINAL Exam-Questions with Correct Answers/ Verified/ 100% Pass
5 views 0 purchase
Course
BIO 322
Institution
BIO 322
mitosis -️️cell division producing genetically identical daughter cells
- start and end as diploid cells
meiosis -️️cell division producing 4 genetically unique gametes
- begin as diploid, end as haploid
interphase -️️- G1: active gene expression, prep for DNA synthesis
- S: DNA do...
interphase - ✔️✔️- G1: active gene expression, prep for DNA synthesis
- S: DNA doubles, sister chromatids for each chromosome
- G2: cells prepare for division
stages of mitosis - ✔️✔️- prophase: chromosome condensation, attach to tubules
- metaphase: chromosomes align at center
- anaphase: tubules pull sister chromatids apart
- telophase: cells split to two daughter cells
what is the number of nuclear DNA molecules in metaphase of mitosis? - ✔️✔️46 chromosomes,
each with 2 sister chromatids = 92 total chromatids
what is the number of nuclear DNA in telophase/cytokinesis of mitosis? - ✔️✔️46 chromosomes,
each with 1 sister chromatid = 46 total chromatids
stages of meiosis I - ✔️✔️- prophase I: homologs form tetrads and share DNA (recombination) at
chiasmata
- metaphase I: homologs align at center
- anaphase I: homologs separate
- telophase I/cytokinesis: cells split into 2 daughter cells
stages of meiosis II - ✔️✔️- prophase II: breakdown of nuclear envelope of 2 cells, chromosome
condensation
- metaphase II: sister chromatids align at center
- anaphase II: sister chromatids separate
, - telophase II/cytokinesis: both cells split in 2; 4 unique daughter cells
what is the number of nuclear DNA in metaphase I in meiosis? - ✔️✔️46 chromosomes with 2 sister
chromatids each = 92 total chromatids
what is the number of nuclear DNA in telophase I in meiosis? - ✔️✔️23 chromosomes with 2 sister
chromatids each = 46 total chromatids
- 1/2 amount of DNA present after S phase
what is the number of nuclear DNA in telophase II in meiosis? - ✔️✔️23 chromosomes with 1 sister
chromatid each = 23 total chromatids
- 1/4 amount of DNA after S phase
features of x-linked recessive inheritance - ✔️✔️1) more males affected than females
2) if aY mates with AA, all progeny will have dominant phenotype (all females Aa, all males AY)
3) if aY mates with Aa, dom:rec ratio will be 1:1
4) mating of aa with AY will yield aY and Aa
features of x-linked dominant inheritance - ✔️✔️1) Aa with AY will transmit the dominant allele to
half of their progeny of each sex
2) AY with aa will transmit dominant allele to all daughters but no sons
3) dominant phenotype is equally frequent in males and females
6 features of autosomal recessive inheritance - ✔️✔️1) those with recessive trait are born to
parents without
2) if one parent has trait, risk of child depends on other parents genes
3) if both parents affected, then all children affected
4) males and females affected equally
5) trait not usually seen in every generation; if affected child is born to unaffected parents, risk to
subsequent children is 1/4
6) if disease is rare, unaffected parents of affected child are more likely to be closely related
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MikeHarris. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
