WorksheetsMeiosis and Natural Selection
Total questions: 30
Worksheet time: 56mins
Name
Class
Date
1.
Which statement correctly describes meiosis?
a)
cells divide only once
b)
meiosis does not occur in reproductive cells
c)
the cells produced at the end of meiosis are genetically identical to the parent cell
d)
The cells produced at the end of meiosis contain half the number of chromosomes as the parent cell
2.
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
3.
Crossing over is important because....
a)
It prevents mutations from entering the gametes.
b)
It allows for even distribution of chromosomes in the gametes.
c)
It allows for more genetic diversity of gametes.
d)
It allows for genetic uniformity of gametes.
4.
An organism's genetic make-up:
a)
phenotype
b)
genotype
c)
dominant
d)
recessive
5.
A chart that crosses two combinations of genes.
a)
punnet square
b)
MRI
c)
X-ray
d)
karyotype
6.
The two ways to increase genetic variation during meiosis are crossing over and _____
a)
Synapsis
b)
Tetrad
c)
Independent assortment
d)
Gameiosis
7.
How many cells are created at the end of Meiosis?
a)
4
b)
2
c)
3
d)
1
8.
Which term refers to the process by which individuals that are better adapted to their environment are more likely to survive and reproduce?
a)
natural selection
b)
overproduction
c)
competition
d)
variation
9.
Having two of the same genes for the trait (TT, tt); Both dominant or both recessive.
a)
homozygous
b)
heterozygous
c)
twin offspring
d)
pairs of chromosomes
10.
Which of the following alleles is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
t
11.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
fancy
12.
Who is considered the "father of genetics"?
a)
Gregor Mendel
b)
Reginald Punnett
c)
James Watson
d)
Justin Bieber
13.
What is the type of inheritance when the offspring show blending of the two alleles?
a)
codominance
b)
mendelian
c)
incomplete
d)
x-linked
14.
In what type of inheritance are both alleles clearly expressed?
a)
codominance
b)
mendelian
c)
incomplete
d)
x-linked
15.
A person that has the allele for a disorder but doesn’t actually have the disorder (but could pass it on to their children) is called a
a)
control
b)
carrier
c)
patient zero
d)
gamete
16.
B = brown fur b = white fur
In the punnett square, what is the probability for white fur?
In the punnett square, what is the probability for white fur?
a)
0%
b)
25%
c)
50%
d)
75%
17.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be:
a)
all black
b)
all white
c)
all gray
d)
speckled black and white
18.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
19.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
codominance
c)
complete dominance
d)
recessive pattern
20.
The dominant trait as seen in this Punnett square is
a)
yellow pea seeds
b)
green pea seeds
c)
there is no dominant seed
d)
Jolly green giant
21.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what?
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
22.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
23.
Changes in population genetics in which extreme values for a trait are favored over normal values
a)
Disruptive Selection
b)
Stabilizing Selection
c)
Directional Selection
d)
Natural Selection
24.
Genetic diversity decreases and the population mean stabilizes on a particular trait value
a)
Disruptive Selection
b)
Stabilizing Selection
c)
Directional Selection
d)
Natural Selection
25.
An extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype
a)
Disruptive Selection
b)
Stabilizing Selection
c)
Directional Selection
d)
Natural Selection
26.
Reproductive cells (sex cells) that unite during sexual reproduction to form a new cell
a)
Chromosome
b)
Gamete
c)
Allele
d)
Genetics
27.
An organism's appearance or other observable characteristics:
a)
phentoype
b)
genotype
c)
recessive
d)
dominant
28.
When two populations are capable of interbreeding but have differences in courtship rituals or other reproductive strategies that involve behaviors
a)
Reproductive Isolation
b)
Behavioral Isolation
c)
Geographic Isolation
d)
Temporal Isolation
29.
Two populations are separated by geographical barriers such as rivers mountains or bodies of water
a)
Reproductive Isolation
b)
Behavioral Isolation
c)
Geographic Isolation
d)
Temporal Isolation
30.
When the members of two populations cannot interbreed and produce fertile offspring.
a)
Reproductive Isolation
b)
Behavioral Isolation
c)
Geographic Isolation
d)
Temporal Isolation
100 %
