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BIO 340 Genetics Exam 1 Questions And 100% Correct Answers Latest Update
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BIO 340 Genetics Exam 1 Questions And 100% CorrectAnswers Latest Update
What is the arrangement of the chromosomes in metaphase? ANSWER Sister
chromatids align along the equatorial plane of the cell.
During which stage of meiosis does sister chromatids (of each dyad) separate?
ANSWER Anaphase II
What is the difference between male gamete generation and female gamete generation
in humans? ANSWER The generation of female, but not male gametes, involves unequal
division of cytoplasm.
Female gametes are ____ times larger than sperm - ANSWER 400
During the production of female gametes, one _____ ____ contains most of the
cytoplasm, and one polar body contains only a small amount. - ANSWER Daughter cell
Chromosome number in meiosis is reduced by ______ - ANSWER 1/2
Meiosis produces gametes, which fuse to form _____ that have the original number of
chromosomes present before meiosis. This can happen only if gametes contain 1/2 the
number of chromosomes as the ______ - ANSWER zygote
DNA replication produces 2 identical molecules, called ______, which separate during
mitosis - ANSWER sister chromatids
Following chromosome condensation, the ____ is the region where the identical DNA
molecules are most tightly attached to each other - ANSWER Centromere
,In dividing cells, most of the cell's growth occurs during _____ - ANSWER Interphase
During mitosis, microtubules attach to chromosomes at the ____ - ANSWER Kinetochore
The _____ is a cell structure composed of microtubules that forms during early mitosis
and plays a role in cell division - ANSWER Mitotic spindle
During interphase, most of the nucleus is filled with a complex of DNA and protein in a
dispersed form called ____ - ANSWER chromatin
In most eukaryotes, division of the nucleus is followed by _____, when the rest of the cell
divides - ANSWER cytokinesis
The ______ are the organizing centers for microtubulues involved in separating
chromosomes during mitosis - ANSWER Centrosomes
When are sister chromatids present in all of part of the phases? - ANSWER S, G2,
Beginning of M
When is DNA condensed in all or part of phase? - ANSWER Beginning of M and End of M
At what stage of the cell cycle is DNA content per cell doubled for all or part of the
phase? - ANSWER S, G2, Beginning of M, End of M
Sister chromatids are formed when DNA replicates in the ___ phase - ANSWER S
The sister chromatids become individual chromosomes once they separate in early
______ - ANSWER Anaphase
, The cellular DNA content doubles in the ___ phase when the DNA replicates - ANSWER S
DNA content of the cell does not return to unreplicated levels until after ____ is complete
and 2 daughter cells have formed - ANSWER Cytokinesis
The condensed state of DNA is independent of whether or not ___ are present - ANSWER
sister chromatids
DNA condenses in ____and remains in that state until after the sister chromatids have
separated, and new daughter cells start forming - ANSWER Prophase
In late ______/_______, the focus moves to cell growth and DNA replication for the next
cell cycle - ANSWER Telophase/Cytokinesis
Most of a human's cells are _____, with 2 sets of chromosomes. One set is from their
mother and one set is from their father. - ANSWER Diploid
Each maternal chromosome has a corresponding paternal chromosome. These
matched pairs are called ______ - ANSWER Homologous chromosomes
During interphase the homologous chromsomes are _____. - ANSWER Duplicated
Following duplication in interphase, each chromosome now contains two identical
copies called _______. - ANSWER Sister chromatids
Each sister chromatid is comprised of ____ wrapped around histone proteins and each
strand coils up into a tight helical fiber - ANSWER DNA
As meiosis starts a _____ an apparatus forms - ANSWER Spindle
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