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bio LT 5cd review

Total questions: 20

Worksheet time: 20mins

Name
Class
Date
1.

In dihybrid crosses, the alleles for the two traits segregate independently of each other when gametes are formed. So when looking at a parent with two traits there are four possible combinations when gametes are formed.

a)

Heterozygous

b)

The Law of Independent Assortment

c)

Molecular genetics

d)

Cross

2.

The alleles must separate when gametes are formed

a)

Trait

b)

The Law of Segregation

c)

Allele

d)

Homozygous

3.

What is a Punnett square used for?

a)

To predict the possible outcomes of a genetic cross.

b)

To calculate the probability of winning a game.

c)

To determine the gender of a baby.

d)

To analyze the results of a scientific experiment.

4.

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

5.
Using the dihybrid cross and key provided, what is the probability of the offspring being tall and white?
a)
9
b)
2
c)
3
d)
6
6.

What goes in box 15

a)

aabb

b)

AABB

c)

aaBB

d)

AAbb

7.
What goes in box 3
a)
Aabb
b)
AABB
c)
AAbb
d)
aaBb
8.
Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
a)
0 %
b)
25%
c)
50%
d)
75%
9.
Why do we see only tall plants in the second generation?
a)
The gene for tall height is dominant
b)
The gene for short height is dominant
c)
The gene for tall height is recessive
d)
The parents did not have the tall gene
10.

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

a)

0%

b)

25%

c)

50%

d)

75%

11.
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.
12.
Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross?
a)
All purple flower offspring
b)
All white flower offspring
c)
Some purple flowers and some white flowers
13.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
14.
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
15.

How do you classify the following genotype : Ee

a)

Homozygous Dominant

b)

Homozygous Recessive

c)

Heterozygous

16.

PP is an example of a _____________ genotype.

a)

Homozygous Dominant

b)

Heterozygous

c)

Homozygous Recessive

17.

Homozygous dominant

a)

FF

b)

Ff

c)

ff

18.

Homozygous recessive

a)

FF

b)

Ff

c)

ff

19.

Heterozygous

a)

FF

b)

Ff

c)

ff

20.
Alternative forms of a gene are called
a)
Alleles
b)
Homozygous
c)
DNA
d)
Genetics

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