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Punnett Squares And Genetics
Test Description: Punnett squares and genetics for 7th grade
Instructions: Answer all questions to get your test result.
1) Which is an example of a phenotype
A
Ff
B
freckles
C
ff
D
FF
2) Which is an example of a genotype?
A
dimples
B
red hair
C
hitch hiker thumb
D
RR
3) If you cross a heterozygous tall Tt with a homozygous tall TT, what % chance do ou have for a child that is short tt
A
100%
B
50%
C
25%
D
0%
4) If you cross to heterozygous talls what chance do you have of offspring that are also heterozygous hybrids?
A
75%
B
25%
C
0%
D
50%
5) What is another name for homozygous?
A
hybrid
B
purebred
C
phenotype
D
heterozygous
6) What is another name for hybrid?
A
phenotype
B
heterozygous
C
homozygous
D
purebred
7) If you cross to short pea plants tt . What chance do they have of having short offspring?
A
100%
B
25%
C
0%
D
75%
8) Which is a hybrid genotype?
A
TT
B
Tt
C
YY
D
tt
9) Which is a purebred genotype?
A
Rr
B
TT
C
Tt
D
Ff
10) Which is a homozygous dominant genotype?
A
tt
B
yy
C
TT
D
Tt
11) Which is a purebred recessive genotype?
A
Tt
B
YY
C
tt
D
TT
12) What tool do we use to predict genetic crosses?
A
watson and cricks staircase
B
pedigree charts
C
mendel's magic shovel
D
punnett squares
13) If yellow (Y) is dominant over blue in sponges which genotype would represent blue sponges?
A
Bb
B
Yy
C
yy
D
YY
14) Can two hybrid parents have purebred offspring?
A
yes
B
I don't know
C
no
D
????
15) Can a homozygous dominant parent and a homozygous recessive parent have a purebred offspring?
A
yes
B
I don't know
C
no
D
???
16) What do we call the different forms of a gene?
A
phenotypes
B
genes
C
genotypes
D
alleles
17) Who was the father of genetics?
A
Gregor Mendel
B
James Watson
C
Louis Pasteur
D
Reginald Punnett
18) Brown hair is an example of a ________
A
punnett square
B
genotype
C
osmosis
D
phenotype
*select an answer for all questions
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