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BIO 322 – FINAL Exam-Questions with Correct Answers/ Verified/ 100% Pass
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BIO 322 – FINAL Exam-Questions with Correct Answers/ Verified/ 100% Pass
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BIO 322 – FINAL Exam-Questions with Correct Answers/ Verified/ 100% Passmitosis - ✔️✔️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 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
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