Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
4.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
5.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
6.
Brown eyes (B) tend to be dominant whereas blue eyes (b) tend to be recessive. Parents with heterozygous genes want to know: what is the likelihood of them having a child with blue eyes?
a)
0%
b)
25%
c)
75%
d)
100%
7.
Which of the following would complete this Punnett Square?
a)
aa
b)
AA
c)
Aa
8.
Which of the following must be the father's genotype?
a)
RR
b)
Rr
c)
rr
9.
G = green, g = yellow The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
10.
Complete the punnett square for the following scenario: In fruit flies, red eyes are dominant to white eyes. The female fly has white eyes and the male fly has homozygous dominant red eyes.
11.
Complete the punnett square for the following scenario: A woman who is a carrier (heterozygous) for Cystic Fibrosis marries a man who has Cystic Fibrosis, a recessive disease.
12.
In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?
a)
Tall = T Short = S
b)
Tall = T Short = t
c)
Tall = t Short = T
d)
Tall = TT Short = tt
13.
A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?
a)
0%
b)
25%
c)
50%
d)
75%
14.
Which of the following genotypes is Purebred? Select 2 answers.
a)
aA
b)
Aa
c)
AA
d)
aa
15.
Different versions of a trait (tall or short, white or purple) are called
a)
alleles
b)
traits
c)
versions
d)
genes
16.
If something is heterozygous, it is also _____
a)
purebred
b)
hybrid
c)
dominant
d)
recessive
17.
If A = red fur and a = white fur, what color fur would Aa be?
a)
red
b)
white
c)
purple
d)
blue
18.
Match the following vocabulary words with their definitions
Genetics
The Scientific study of heredity
Heredity
The process in which characteristics are passed down from parents to offspring.
Trait
An organism's characteristics.
Genotype
The specific genetic make up or "code" for an individual.
Phenotype
The total physical appearance for an individual.
19.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
20.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
แป้นคำตอบ
Life Sci: Punnett Squares
คำถามทั้งหมด: 20
1.
a) genotypes
2.
a) dominant
3.
c) AA
4.
a) Bb
5.
b) dominant
6.
b)
25%
7.
a)
aa
8.
b)
Rr
9.
c) gg
10.
ไม่มี
11.
ไม่มี
12.
b) Tall = T Short = t
13.
c) 50%
14.
c)
AA
, d)
aa
15.
a)
alleles
16.
b)
hybrid
17.
a)
red
18.
Genetics
-
The Scientific study of heredity
,
Heredity
-
The process in which characteristics are passed down from parents to offspring.
,
Trait
-
An organism's characteristics.
,
Genotype
-
The specific genetic make up or "code" for an individual.