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Punnett Squares
Test Description: Punnett Square questions = practice for quiz #3
Instructions: Answer all questions to get your test result.
1) The punnet square is best used to
A
show the probability or chances of having a child with certain traits
B
show that everyone can have children with any trait
C
show how parents make gametes
D
show the relationships of a family and their genetic diseases
2) Which one is FALSE?
A
Two right-handed parents (Rr and Rr) can have a left-handed baby (rr)
B
Two recessive parents (Ex: bb and bb) can have a baby with a dominant trait (Bb)?
C
Outside the Punnett square shows the parent's gametes for a trait
D
Inside the Punnett square shows the possible children's traits
3) Why don't two parents have all their children look the same?
A
It is all because of mutations each time
B
Because our DNA changes during our life
C
Because the eggs and sperm are all different combinations of the parent's genes
D
Because all the eggs are the same, but all the sperm is different.
4) What traits an offspring gets depends on
A
genes only from the male’s sperm
B
genes in both the sperm and egg
C
genes only from the female’s egg
D
it has nothing to do with the eggs and sperm
5) Why do some traits show up in the child from the mother and sometimes it is from the father?
A
It is always an exact 50/50 mix of mom and dad ( traits are always equal showing up)
B
It is just a lucky chance
C
The father has the strongest traits
D
The baby gets whatever sperm or egg had the dominant traits
6) Which genotype below is heterozygous?
A
hh
B
Hh
C
BB
D
none of these
7) If both parents are something, like right-handed, and the baby ends up left handed, that means the parent's genotypes were...
A
Rr and RR
B
RR and RR
C
two right-handed parents can't have a left handed baby!
D
Rr and Rr
8) Cross a heterozygous right-handed dad and a left-handed mom. What percent of left-handed kids would you expect?
A
25%
B
0%
C
100%
D
50%
9) Versions of a trait, such as blue , green, brown, and hazel for eyes are called
A
homozygous traits
B
alleles
C
combinations
D
genotypes
10) Have two of the same genes from your parents, like BB is called
A
heterozygous dominant
B
homozygous recessive
C
heterozygous
D
homozygous dominant
11) What is the proper name for Nn?
A
homozygous dominant
B
heterozygous
C
heterozygous dominant
D
homozygous recessive
12) Which statement about genetics is NOT TRUE:
A
There are 2 genes for each trait
B
There are dominant and recessive traits
C
a person can carry a gene for a trait in their chromosomes that does not show up in them.
D
The dad's traits are usually stronger than the moms.
*select an answer for all questions
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