WorksheetsMendelian Genetics
Total questions: 14
Worksheet time: 20mins
Name
Class
Date
1.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
2.
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%
3.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
4.
A corn plant heterozygous for tall sprouts mates with a corn plant with short sprouts. If tall sprouts are dominant, how many different phenotypes are possible in the offspring?
a)
1
b)
2
c)
3
d)
4
5.
If T=Tall & t=short, what is the genotypic ratio?
a)
1:3
b)
3:1
c)
1:2:1
d)
2:2
6.
R = round, r = wrinkled
Y = yellow, y = green
Which of the following statements are true?
a)
There is 100% chance of having wrinkled, green peas
b)
There is NO chance of having any wrinkled, green peas.
c)
There is a 50% of chance of having round, yellow peas.
d)
There is NO chance of having round, yellow peas.
7.
In watermelons, green rinds (G) are dominant to striped rinds (g). What is the genotype of a heterozygous green watermelon?
a)
GG
b)
Gg
c)
gg
d)
green
8.
In cacti, long arms (A) are dominant to short arms (a). Suppose 2 heterozygous cacti are crossed. What percentage of their offspring are expected to have short arms?
a)
0%
b)
25%
c)
75%
d)
100%
9.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being purple?
According to the Punnett Square, what is the probability of an offspring being purple?
a)
25%
b)
0%
c)
100%
d)
50%
10.
Long tongues (T) are dominant to short tongues in green tree frogs. What is the probability that two frogs that are heterozygous for long tongues could produce offspring with short tongues?
a)
100%
b)
75%
c)
50%
d)
25%
11.
During meiosis and gamete formation, homologous (paired up) alleles split up
a)
Phenotype
b)
Law of Segregation
c)
Genotype
d)
Dihybrid Cross
12.
During meiosis, the homologous pairs of chromosomes and the matching alleles are lined up independently.
Offspring are a mix of maternal genes and paternal genes.
This increases genetic variation.
a)
Homozygous Dominant
b)
Law of Segregation
c)
Crossing Over
d)
Independent Assortment
13.
What is the percentage of homozygous recessive offspring?
a)
0%
b)
25%
c)
50%
d)
75%
14.
D = dimples d = no dimples
What is the genotype for a homozygous recessive offspring?
What is the genotype for a homozygous recessive offspring?
a)
DD
b)
Dd
c)
dd
100 %
