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HW Mendelian Genetics

Total questions: 15

Worksheet time: 7mins

Name
Class
Date
1.

Which term refers to an organism's physical appearance

a)

recessive allele

b)

dominant

c)

genotype

d)

phenotype

2.

Which term refers to an organism's genetic traits?

a)

offspring

b)

genotype

c)

phenotype

d)

behavior

3.

Mendel concluded that alleles for tall pea plants is dominant. If you cross a TT with a Tt, how many plants would be tall?

a)

50%

b)

100%

c)

25%

d)

75%

4.

Is it possible for 2 blue bellied monsters to have a green bellied child? How?

a)

Yes, they could both have a recessive allele that is passed to the offspring.

b)

No, it is impossible to have a green bellied child.

5.

What allele is covered up by the other allele in a homologous pair?

a)

Homozygous

b)

Dominant

c)

Recessive

d)

Genetics

6.

The observable traits dictated by the genotype are referred to as the ... ?

a)

Phenotype

b)

Genotype

c)

Homozygous Recessive

d)

Homozygous Dominant

7.

During meiosis, the homologous pairs of chromosomes are lined up independently, resulting in offspring that mix maternal and paternal genes.

This is called ...

a)

Homozygous Dominant

b)

Recessive gene

c)

Crossing over

d)

Genetic variation

8.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
9.
In Mendel's pea plants, the homozygous recessive phenotype was white flowers.  If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring?
a)
white and purple
b)
white 
c)
purple
d)
lavendar
10.
Dominant alleles are represented by a(n)
a)
phenotype
b)
lower case letter
c)
upper case letter
d)
punnett square 
11.
What is the percentage of a homozyogus dominant offspring?
a)
75%
b)
50%
c)
25%
d)
0%
12.
If two purebred species (BB) are crossed, what percentage of their offspring would be BB?
a)
25%
b)
50%
c)
75%
d)
100%
13.

Short hair (S) is dominant to long hair (s).

What is the genotype for an offspring with long hair?

a)

SS

b)

Ss

c)

ss

d)

Sa

14.
The observable traits of an organism are known as its
a)
allele
b)
dominance
c)
phenotype
d)
genotype
15.
In dragons, large scales (S) are dominant and small scales (s) are recessive. A dragon that is heterozygous for the trait is crossed with a dragon that has small scales. What should be the ratio of large-scaled dragons to small-scaled dragons among the offspring?
a)
1:2
b)
1:1
c)
2:1
d)
3:1