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Mendelian Genetics

Total questions: 20

Worksheet time: 19mins

Name
Class
Date
1.

Who is known as the "father of genetics"?

a)

Charles Darwin

b)

Karl Ernst von Baer

c)

Gregor Mendel

d)

Francis Franklin

2.

A HETEROZYGOUS individual would have the genotype:

a)

Hh

b)

hh

c)

HH

d)

Hi

3.

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

a)

BB

b)

Bb

c)

bb

d)

None of the above, brown eyes are dominant.

4.

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

a)

25%

b)

50%

c)

75%

d)

100%

5.

Genes determine the characteristics, or __?__, that an individual can have.

a)

chromosomes

b)

cells

c)

genetics

d)

traits

6.

Sections of DNA on a chromosome are called:

a)

nuclei.

b)

RNA.

c)

genes.

d)

traits.

7.
What do we call the result of the genotype (for example, the color of the peas)?
a)
Visible traits
b)
Physiotrait
c)
Genotype 2
d)
Phenotype
8.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
9.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
10.
The letters on the TOP AND SIDE of a punnett square represent ______________.
a)
The combination of alleles in offspring.
b)
The possible alleles given by the parents following meiosis.
c)
The genotype and phenotype of offspring.
d)
The results of genetic mutations in offspring.
11.

What is the predicted percentage of homozygous recessive offspring in this cross?

a)

0%

b)

25%

c)

50%

d)

75%

12.

The same gene can come in different versions, the different versions of a gene are called

(a)  

Choose from the below words
Alleles
Chromosomes
Traits
13.
Which combination is Homozygous Dominant
a)
HH
b)
Hh
c)
hh
d)
hH
14.

If your genotype is Bb, then you can only pass a B or b to your child but you can't pass both.

a)

Law of Dominance

b)

Law of Segregation

c)

Law of Independent Assortment

15.

A recessive allele is only expressed when a dominant allele is not present

a)

Law of dominance

b)

Law of inheritance

16.

Different traits are inherited independently of each other

a)

Law of independent assortment

b)

Genetics law

17.
In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?
a)
100%
b)
75%
c)
50%
d)
25%
18.
In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are homozygous for the recessive allele, the percent of offspring expected to exhibit tallness is
a)
 25%
b)
 75%
c)
100%
d)
0%
19.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
20.

Based off this punnett square, what fraction of the offspring will have wrinkled, yellow seeds?

a)

9/16

b)

3/16

c)

1/16

d)

16/16

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