WorksheetsSexual Reproduction II
Total questions: 22
Worksheet time: 27mins
Name
Class
Date
1.
If a sperm and an egg, each produced by mitosis, contributed all their chromosomes to the embryo, how many chromosomes would the resulting embryo have?
a)
12
b)
23
c)
46
d)
92
2.
During which phase of mitosis do sister chromatids separate from each other
a)
Prophase
b)
metaphase
c)
anaphase
d)
telophase
3.
Several samples contains 23 individual chromosomes. What type of cells might they be?
a)
lung cells
b)
lung cells
c)
impossible to tell cells
d)
egg cells
4.
Which diagram best represents the process of sperm formation in an organism that has a diploid chromosome number of 8?
a)
D
b)
A
c)
B
d)
None of them
5.
Each chromosome contains two identical parts called
a)
Chromatin
b)
Chromosome
c)
Sister Chromatid
d)
centromere
6.
What is polyploidy
a)
The presence of one or more extra chromosomes sets in an organism
b)
The frequency of crossover that occurs during meiosis
c)
The rate of independently linked genes
d)
random allele assortment (Independent assortment)
7.
A haploid cell has
a)
one-half of a set of chromosomes
b)
one set of chromosomes
c)
two sets of chromosomes
d)
four sets of chromosomes
8.
What is the probability of two cystic fibrosis carriers having a child with cystic fibrosis?
a)
0%
b)
25%
c)
50%
d)
100%
9.
which of the following cells is haploid?
a)
nerve cell
b)
gamete
c)
skin cell
d)
muscle cell
10.
Which of the following correctly represents a dihybrid cross?
a)
aabb x AaBb
b)
ab x Ab
c)
aa x Aa
d)
aabbcc x AaBbcc
11.
The result of meiosis is:
a)
two genetically different diploid cells
b)
two genetically identical haploid cells
c)
four genetically different diploid cells
d)
four genetically indentica haploid cells
12.
Which is the correct description of this genotype (Tt)
a)
homozygous dominant
b)
heterozygous
c)
heterozygous dominant
d)
homozygous recessive
13.
What are genes
a)
DNA segments
b)
chromosome traits
c)
haploid cells
d)
pairs of chromosomes
14.
Which of the following represents a homozygous recessive genotype?
a)
Rr
b)
RR
c)
rR
d)
rr
15.
Human eggs and sperm are _____, and each has ____ chromosomes.
a)
diploid, 23
b)
diploid, 46
c)
haploid, 23
d)
haploid, 46
16.
Cells containing two alleles for each trait are described as
a)
haploid
b)
heredity
c)
diploid
d)
homozygous
17.
Which of the following DOES NOT increase variation in the next generation?
a)
Independant Assortment
b)
Random Fertilization
c)
Crossing Over
d)
Assexual reproduction
18.
A purebred tall plant is crossed with a purebred short plant. All the F1 offspring are tall. What can you say about the allele for tallness?
a)
It is recessive
b)
It is co-dominant
c)
It is dominant
d)
It is heterozygous
19.
When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _________________ occurs
a)
crossing over
b)
mutagenesis
c)
hybridization
d)
fertilization
20.
What phase is shown in the picture?
a)
metaphase 2
b)
metaphase 1
c)
anaphase 1
d)
prophase 2
21.
Differernt forms of a gene are called
a)
hybrids
b)
dominant factors
c)
alleles
d)
recessive factors
22.
what offspring are predicted from a Bb x bb cross?
a)
all Bb
b)
all bb
c)
50 % Bb and 50 % bb
d)
75% Bb and 25% bb
100 %
