AP Bio Unit 4 questions and answers
with solutions
In what form is DNA loose non-condensed and condense and organized? - ANSWER non-
condensed=chromatin; condensed=chromosome
2 gametes combine to form a _____. What are the 2 gametes? - ANSWER zygote; sperm and egg
What occurs during anaphase? - ANSWER sister chromatids separate
What happens when a cell undergoes mitosis but not cytokinesis? - ANSWER the cell has 2
nuclei
Following (but not including) which phase of the cell cycle do we have 2 sister chromatids? -
ANSWER S phase
This protein is involved in passing cell cycle checkpoints and its concentration will cycle up and
down depending on what stage of the cell cycle the cell is in - ANSWER cyclin
What occurs during the S phase? - ANSWER DNA synthesis
Mitosis produces what kinds of daughter cells? - ANSWER 2 genetically identical cells with 46
chromosomes
Which checkpoint in the cell cycle is considered the restriction point? - ANSWER G1 checkpoint
When do chromosomes first become visible in mitosis? - ANSWER prophase
, In both mitosis and meiosis, sister chromatids separate during anaphase, but there are ___
haploid daughter nuclei produced by meiosis compared to ____ diploid nuclei by mitosis -
ANSWER 4; 2
What is the period in the cell cycle between divisions? - ANSWER interphase
When does the nuclear envelope disappear in mitosis? - ANSWER prophase
Meiosis reduces _____. Fertilization restores _____. - ANSWER chromosome number
Once mitosis is complete what is the next step? - ANSWER cytokinesis
When does crossing over occur in Meiosis? - ANSWER Prophase I
What is a protein that aids in adding a phosphate? - ANSWER protein kinase
Tetrads of chromosomes are lined up at the equator during which stage of Meiosis? - ANSWER
Metaphase I
Where do chromosomes become visible in Meiosis? - ANSWER Prophase I and II
At what stage do chromatids separate in Meiosis? - ANSWER Anaphase II
What kinds of cells are typically in G0? - ANSWER Nerve, muscle, and liver cells
with solutions
In what form is DNA loose non-condensed and condense and organized? - ANSWER non-
condensed=chromatin; condensed=chromosome
2 gametes combine to form a _____. What are the 2 gametes? - ANSWER zygote; sperm and egg
What occurs during anaphase? - ANSWER sister chromatids separate
What happens when a cell undergoes mitosis but not cytokinesis? - ANSWER the cell has 2
nuclei
Following (but not including) which phase of the cell cycle do we have 2 sister chromatids? -
ANSWER S phase
This protein is involved in passing cell cycle checkpoints and its concentration will cycle up and
down depending on what stage of the cell cycle the cell is in - ANSWER cyclin
What occurs during the S phase? - ANSWER DNA synthesis
Mitosis produces what kinds of daughter cells? - ANSWER 2 genetically identical cells with 46
chromosomes
Which checkpoint in the cell cycle is considered the restriction point? - ANSWER G1 checkpoint
When do chromosomes first become visible in mitosis? - ANSWER prophase
, In both mitosis and meiosis, sister chromatids separate during anaphase, but there are ___
haploid daughter nuclei produced by meiosis compared to ____ diploid nuclei by mitosis -
ANSWER 4; 2
What is the period in the cell cycle between divisions? - ANSWER interphase
When does the nuclear envelope disappear in mitosis? - ANSWER prophase
Meiosis reduces _____. Fertilization restores _____. - ANSWER chromosome number
Once mitosis is complete what is the next step? - ANSWER cytokinesis
When does crossing over occur in Meiosis? - ANSWER Prophase I
What is a protein that aids in adding a phosphate? - ANSWER protein kinase
Tetrads of chromosomes are lined up at the equator during which stage of Meiosis? - ANSWER
Metaphase I
Where do chromosomes become visible in Meiosis? - ANSWER Prophase I and II
At what stage do chromatids separate in Meiosis? - ANSWER Anaphase II
What kinds of cells are typically in G0? - ANSWER Nerve, muscle, and liver cells
