WorksheetsGenetics Support Biology
Total questions: 20
Worksheet time: 59mins
Name
Class
Date
1.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
2.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
3.
Heterozygous is when...
a)
the alleles are the same
b)
the alleles are different
c)
the alleles are absent
d)
the alleles are present
4.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
5.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
6.
We all have two alleles, or versions, of each gene. Being (a) for a particular gene means you inherited two identical versions. It's the opposite of a (b) genotype, where the alleles are different. People who have recessive traits, like blue eyes or red hair, are always homozygous for that gene.
Choose from the below words
homozygous
heterozygous
7.
The different forms of genes are known as
a)
environment
b)
probability
c)
traits
d)
alleles
8.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
9.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
10.
How many alleles (letters) does a child get from each parent for each trait?
a)
1
b)
2
c)
3
d)
4
11.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
12.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
13.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
14.
(a) are always expressed when the connected allele is dominant, even if only one copy of the dominant trait exists. (b) are expressed only if both the connected alleles are recessive.
Choose from the below words
Dominant traits
Recessive traits
15.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
16.
One form of a gene is called_______________
a)
a DNA
b)
a Phenotype
c)
a trait
d)
an allele
17.
The study of heredity and the variation of inherited characteristics
a)
gene
b)
genetics
c)
meiosis
d)
hybrid
18.
Are recessive traits shown with capital or lowercase letters?
a)
Capital
b)
Lowercase
19.
Two of the same genes for a trait (sometimes called purebred). BB or bb
a)
homozygous
b)
hetrozygous
c)
protein
d)
chromosome
20.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
100 %
