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Bio 30 Unit C: Cell Division, Genetics, and
Molecular Biology Questions and Verified
Answers
Chromatin
Ans: chromosomes that are a combination of DNA and proteins
Chromatid
Ans: unduplicated chromosome
Sister chromatid
Ans: duplicated chromosome
Centrioles
Ans: small protein body found in the cytoplasm that provides attachment
for spindle fibres during cell division
Centromere
Ans: the region on a chromosome where the spindles attach
Spindle fibres
Ans: protein structure that guides chromosomes during cell division
Mitosis
Ans: makes perfect copies of your genome
-1 cell division
-no variation
-occurs on somatic cells
Interphase
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Ans: -duplicates genetic info
-G1 (growth phase 1) making proteins and cytoplasmic organelles
-S (synthesizing genetic materials) making a copy of the chromosome and
other proteins
-G2 (growth phase 2) continues producing protein and organelles
Prophase
Ans: -chromosomes thicken and shorten
-spindle fibres attach to centromeres
-nuclear membrane dissolves
Metaphase
Ans: -sister chromatids move toward the center of the cell
-line up along the equatorial plate
Anaphase
Ans: -centrioles divide the sister chromatids
-chromosomes move toward opposite poles (segregation)
Telophase
Ans: -chromosomes lengthen and intertwine
-spindle fibres dissolve
-nuclear membrane forms again around the chromatin
Cytokinesis
Ans: -cytoplasm begins to divide
-provides organelles for each new cell
-forms daughter cells
Identical twins
Ans: one egg cell, one sperm cell
Fraternal twins
Bio 30 Unit C: Cell Division, Genetics, and
Molecular Biology Questions and Verified
Answers
Chromatin
Ans: chromosomes that are a combination of DNA and proteins
Chromatid
Ans: unduplicated chromosome
Sister chromatid
Ans: duplicated chromosome
Centrioles
Ans: small protein body found in the cytoplasm that provides attachment
for spindle fibres during cell division
Centromere
Ans: the region on a chromosome where the spindles attach
Spindle fibres
Ans: protein structure that guides chromosomes during cell division
Mitosis
Ans: makes perfect copies of your genome
-1 cell division
-no variation
-occurs on somatic cells
Interphase
, Page | 2
Ans: -duplicates genetic info
-G1 (growth phase 1) making proteins and cytoplasmic organelles
-S (synthesizing genetic materials) making a copy of the chromosome and
other proteins
-G2 (growth phase 2) continues producing protein and organelles
Prophase
Ans: -chromosomes thicken and shorten
-spindle fibres attach to centromeres
-nuclear membrane dissolves
Metaphase
Ans: -sister chromatids move toward the center of the cell
-line up along the equatorial plate
Anaphase
Ans: -centrioles divide the sister chromatids
-chromosomes move toward opposite poles (segregation)
Telophase
Ans: -chromosomes lengthen and intertwine
-spindle fibres dissolve
-nuclear membrane forms again around the chromatin
Cytokinesis
Ans: -cytoplasm begins to divide
-provides organelles for each new cell
-forms daughter cells
Identical twins
Ans: one egg cell, one sperm cell
Fraternal twins
