BSC 1010 Chapter Notes - Chapter 9: Sister Chromatids, Nondisjunction, Y Chromosome

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Published on 3 Jul 2019
School
FIU
Department
Biological Science
Course
BSC 1010
Professor
BSC 1010
Chapter Nine
Review Questions
1.
The abbreviation n indicates that a cell is
haploid.
2.
Among humans, we observe that there is
abundant variability in the size, shape, hair,
eye and skin color, and most other traits. The
variety in population results from _________
the events in the sexual reproduction and
meiosis.
independent assortment, random
fertilization, and crossing over
3.
Asexual reproduction results in identical
offspring unless what occurs?
Mutation
4.
Autosomes include __________.
all the pairs of chromosomes, except the
X and Y chromosomes
5.
A cell with one set of chromosomes would be
termed a _________ cell.
haploid
6.
cell with two full sets of chromosomes would
be termed a ________ cell.
diploid
7.
The chromosomal combination for a human
female is
XX.
8.
The chromosomal combination for a human
male is
XY.
9.
Chromosomes that look alike and carry the
same sequence of genes for the same traits
from two parents, are
homologous chromosomes.
10.
A diploid germ cell reduces its chromosome
number by half to generate four haploid
nuclei in
meiosis.
11.
Diploid means having
two complete sets of homologous
chromosomes.
12.
Down syndrome is caused by
nondisjunction.
13.
During G1 stage of interphase, a diploid
organism contains how many copies of each
gene (allele)?
2
14.
An example of a haploid cell is a
sperm cell.
15.
The failure of sister chromatids to separate
would result in how many normal gametes?
2
16.
The failure of the sister chromatids to
separate during meiosis is called
nondisjunction.
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