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WorksheetsGenetics Heredity and Reproduction review
Total questions: 31
Worksheet time: 16mins
Name
Class
Date
1.
What process is responsible for passing down exact duplicates of ALL traits.
a)
mitosis
b)
meiosis
2.
Which process is responsible for passing down some traits, but not all traits to their offspring?
a)
mitosis
b)
meiosis
3.
Which traits are determined by chromosomes?
a)
acquired
b)
inherited
4.
Which of the following traits would be passed down through chromosomes?
a)
a scar
b)
the organism's language
c)
blue eyes
d)
pierced ears
5.
The code letters that represent a particular trait are called its _______
a)
phenotype
b)
chromosomes
c)
genotype
d)
pedigree
6.
The physical expression (what it looks like) of genetic code is called its ______
a)
phenotype
b)
chromosomes
c)
genotype
d)
pedigree
7.
A dominant allele __________
a)
is strong and will show up in the phenotype
b)
is weak and will not show up in the phenotype
c)
is strong and will show up in the genotype
d)
is weak and will not show up in the genotype
8.
If an organism has 2 dominant alleles for a trait, it is _________ for that trait.
a)
heterozygous
b)
carriers
c)
homozygous
d)
recessive
9.
If an organism has 2 recessive alleles for a particular trait, it is _______ for that trait.
a)
heterozygous
b)
carriers
c)
homozygous
d)
recessive
10.
If an organism has one dominant allele and one recessive allele, it is _________ for that trait.
a)
homozygous
b)
heterozygous
11.
True or False? In order for an organism to show a recessive trait in their phenotype, they must have 2 recessive alleles in their genotype.
a)
True
b)
False
12.
True or False? If an organism has both a dominant and a recessive alleles for a trait, it may have 2 different phenotypes.
a)
True
b)
False
13.
If 2 brown (dominant) gerbils produce offspring that are white (recessive), what must their genotypes be?
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
homozygous or heterozygous
14.
If white gerbils are recessive, what must their genotypes be?
a)
WW
b)
Ww
c)
ww
d)
WW orWw
15.
If a recessive white gerbil has two dominant brown parents, how is it able to be white?
a)
both parents gave 2 recessive alleles
b)
both parents gave 2 dominant alleles
c)
It received one recessive allele from each parent
d)
it received 2 recessive alleles from one parent
16.
How is it possible for 2 red (dominant) roses to produce white (recessive) offspring?
a)
the offspring inherited DNA for white color from both parent plants
b)
the offspring inherited DNA for white color from at least one parent plant
17.
How are the traits of an organism determined?
a)
changes in the environment
b)
the impact of animals in the environment
c)
instructions on chromosomes inside the cells of the organism
d)
the resources in the environment
18.
How many different phenotypes would result from a cross between GG and gg?
a)
1
b)
2
c)
3
d)
4
19.
How many different phenotypes would result from a cross between Gg and Gg?
a)
1
b)
2
c)
3
d)
4
20.
How many different phenotypes would result from a cross between Gg and gg?
a)
1
b)
2
c)
3
d)
4
21.
What would result from a cross between a heterozygous parent and a homozygous recessive parent?
a)
50/50
b)
25% dominant 75% recessive
c)
75% dominant 25% recessive
d)
100% dominant
22.
If offspring has a recessive phenotype, is it possible for either parent to be homozygous dominant?
a)
yes!
b)
no!
c)
only if it's the mother
d)
only if it's the father
23.
If a child is produced with a dominant trait, what would be true of his/her parents?
a)
one or both parents has the trait
b)
both definitely have the trait
c)
it's possible that neither have the trait but both carry it
d)
it's possible that neither have the trait but at least one carries it
24.
Is it possible for 2 homozygous recessive parents to produce offspring with a dominant phenotype?
a)
yes
b)
no
c)
only if it is a male
d)
only if it is a female
25.
Which process produces variation in the cells produced?
a)
mitosis
b)
meiosis
26.
Which process produces offspring that is identical to the parent?
a)
sexual reproduction through meiosis
b)
asexual reproduction through mitosis
c)
sexual reproduction through mitosis
d)
asexual reproduction through meiosis
27.
In sexual reproduction, the genetic material comes from one parent? or two parents?
a)
One parent
b)
two parents
c)
either
d)
neither
28.
Which process produces variation among members of its species?
a)
mitosis/sexual reproduction
b)
meiosis/sexual reproduction
c)
mitosis/asexual reproduction
d)
meiosis/asexual reproduction
29.
True or False? In meiosis, a second division takes place in which the sister chromatids are separated.
a)
True
b)
False
30.
How could we possibly prevent extinction of endangered species?
a)
mitosis
b)
meiosis
c)
cloning
31.
If plants were genetically modified to produce their own pesticides, how would this save farmers money?
a)
Farmers could sell their food at a higher price
b)
these plants would require less chemical treatment
c)
the plants would take up less space
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