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