WorksheetsGenetics Review
Total questions: 35
Worksheet time: 40mins
Name
Class
Date
1.
The man who studied genetics and came up with genetics is
a)
Watson
b)
Crick
c)
Mendel
d)
Darwin
2.
A phenotype is the...
a)
letter combination
b)
dominant gene
c)
recessive gene
d)
physical appearance
3.
Another word for homozygous is...
a)
purebred
b)
hybrid
c)
heterozygous
d)
dominant
4.
Dominant alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
5.
Recessive alleles are-
a)
capital
b)
lowercase
c)
both
d)
neither
6.
Tt is-
a)
homozygous dominant
b)
homozygous recessive
c)
heterozygous
d)
none of these
7.
Purple is dominant to white. A heterozygous purple flower is crossed with a white flower. What are the genotypes and phenotypes of the offspring?
a)
100% Pp (purple)
b)
50% Pp (purple); 50% pp (white)
c)
75% Pp (purple); 25% pp (white)
d)
25% PP, 50% Pp, 25% pp
75% purple, 25% white
75% purple, 25% white
8.
If a pea plant were homozygous recessive for height, how would its alleles be represented?
a)
TT
b)
Tt
c)
tt
d)
tT
9.
Which is the correct phenotype for this organism?
a)
BB
b)
blue
c)
green
d)
bb
10.
What is the genotype for this organism?
(E= 3 eyes, e= 1 eye)
(E= 3 eyes, e= 1 eye)
a)
EE
b)
Ee
c)
ee
d)
EE or Ee
11.
If green is dominant over purple, then what is the genotype for this individual?
a)
Purple
b)
Green
c)
GG
d)
gg
12.
Brown fur color is dominant over black fur color. Which of the following is the actual genotype of ALL of the offspring in the next generation of this cross for fur color?
AA x aa
AA x aa
a)
AA
b)
Aa
c)
aa
d)
brown fur
13.
A cross between two tall garden pea plants produced 314 tall plants and 98 short plants. What genotypes are the parents?
a)
TT and tt
b)
TT and Tt
c)
Tt and Tt
d)
TT and TT
14.
Pairs of genes that control the same trait are known as
a)
allelles
b)
gametes
c)
hybrids
d)
loci
15.
An allele whose trait only shows up when no dominant allele is present.
a)
hidden allele
b)
dominant allele
c)
recessive allele
d)
present allele
16.
The formation of the sex cells
a)
homozygus
b)
Punnett square
c)
pedigree
d)
meiosis
17.
Number of chromosomes in a human’s body cell.
a)
100
b)
50
c)
46
d)
23
18.
Another word for heterozygous.
a)
homozygus
b)
dominant
c)
recessive
d)
hybrid
19.
The gene makeup of an organism is called
a)
genotype
b)
multiple allele
c)
mutation
d)
phenotype
20.
The physical make-up of an organism is called
a)
genotype
b)
allele
c)
mutation
d)
phenotype
21.
If Y represents the gene for yellow seeds and y represents the gene for green seeds, which is a hybrid?
a)
Yy
b)
YY
c)
yy
d)
none of these
22.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
23.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
24.
What ratio of the offspring from the cross shown will be homozygous recessive for the trait of tallness?
a)
0 in 4
b)
1 in 4
c)
2 in 4
d)
4 in 4
25.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
26.
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%
27.
Georgette wants to breed her pet phoenixes, but she isn't sure if the babies will burst into blue flames or red flames. Her documents show that her female phoenix is homozygous dominant for red flames, while her male phoenix is homozygous recessive for blue flames. What color flames will the babies have?
a)
Red
b)
Blue
c)
Purple
d)
50% Red, 50% Blue
28.
Leonardo bet his friend Olivet that two heterozygous green-eyed sea monsters could not have a recessive blue-eyed baby sea monster. Olivet said they can have a blue-eyed sea monster.
Who wins the bet?
Who wins the bet?
a)
Leonardo
b)
Olivet
c)
Both
d)
Neither
29.
A Jawa notices that his beloved pet desert rat, who has brown fur, just had several rat babies, some of which had white fur and some which had brown fur. Brown fur is the dominant trait. This means his rat must have what genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
30.
What phenotype would result from crossing a homozygous dominant purple-flowered pea plant with a homozygous recessive white-flowered pea plant?
a)
Pp
b)
Purple
c)
White
d)
PP and pp
31.
Bob the abominable snowman lives in the snowy Andes mountains. He has white fur, which blends in nicely. He is therefore dismayed when his mate keeps having red-furred babies. What is Bob's likely genotype?
a)
Homozygous Dominant
b)
Heterozygous
c)
Homozygous Recessive
32.
What genotype is missing from this Punnett Square?
a)
RrYy
b)
RRYY
c)
rryy
d)
RrYY
33.
Which of the following is NOT a genotype?
a)
heterozygous
b)
a trait
c)
Bb
d)
homozygous recessive
34.
1 BB : 1 Bb : 2 bb
a)
genotypic ratio
b)
phenotypic ratio
35.
What genotype would go in box 1?
a)
BB
b)
Bb
c)
bb
100 %
