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WorksheetsBasic Genetics
Total questions: 20
Worksheet time: 45mins
Name
Class
Date
1.
What are genes?
a)
units that carry instructions for traits
b)
the study of heredity
c)
threadlike structures in the nucleus
d)
genetic material that makes up genes
2.
What is genetics?
a)
The study of heredity.
b)
The unit of inheritance that carries instructions for traits.
c)
Structures in the nucleus that carry genes.
d)
Genetic materials that make up genes.
3.
What are chromosomes?
a)
the study of heredity
b)
units of inheritance that carry instructions for traits
c)
genetic material that makes up genes
d)
threadlike structures in the nucleus that carry genes
4.
What is the meaning of homozygous?
a)
Combination of the same alleles
b)
Combination of different alleles
c)
Expressed with a single copy of the allele
d)
Requires two alleles to be expressed
5.
What is the meaning of heterozygous?
a)
Combination of the same alleles
b)
Combination of the different alleles
c)
Expressed with a single copy of the allele
d)
Requires two alleles to be expressed
6.
Define the term - Dominant allele.
a)
Combination of the same alleles
b)
Combination of different alleles
c)
Expressed with a single copy of the allele
d)
Requires two alleles to be expressed
7.
Define the term - Recessive allele.
a)
Combination of the same alleles
b)
Expressed with a single copy of the allele
c)
Combination of the different alleles
d)
Requires two alleles to be expressed
8.
Define genotype.
a)
Genetic make-up of a trait.
b)
Physical expression of a trait.
c)
Tool used to display potential probabilities for offspring.
d)
The amount of genes in a given population.
9.
Define phenotype.
a)
Genetic make-up of a trait.
b)
Physical expression of a trait.
c)
Tool used to display potential probabilities for offspring.
d)
The amount of genes in a given population.
10.
What is a Punnett Square?
a)
Genetic make-up of a trait.
b)
Physical expression of a trait.
c)
Tool used to display potential probabilities for offspring.
d)
The amount of genes in a given population.
11.
Which genotype represents a recessive trait?
a)
AA
b)
Aa
c)
aa
12.
Tall plants are dominant. Which statement is true of the plant offspring using this Punnett Square?
a)
50% of the offspring will be short.
b)
75% of the offspring will be tall.
c)
100% of the offspring will be heterozygous.
d)
25% of the offspring will be tall.
13.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
14.
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%
15.
A person heterozygous for wet earwax (Ww) mates with a person homozygous recessive for dry earwax (ww). What is the chance their baby is heterozygous?
a)
0%
b)
25%
c)
50%
d)
100%
16.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
17.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
18.
having two different genes for a trait (sometimes called hybrid).
a)
protein
b)
homozygous
c)
heterozygous
d)
genotype
19.
Which of the following genotypes is a purebred?
a)
Bb
b)
Gg
c)
bb
d)
Dd
20.
Which of the following genotypes would be considered heterozygous?
a)
BB
b)
gg
c)
Ff
d)
TT
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