WorksheetsGenetics and Heredity 1
Total questions: 25
Worksheet time: 25mins
What is a trait?
A piece of DNA
A condensed rod of chromatin
A characteristic that can be passed to offspring
A way to change DNA
Gregor Mendel studied _______ for many years and made conclusions about their inheritance.
grasshoppers
meerkats
pea plants
unicellular organisms
What are the different forms of a gene called?
traits
nitrogen bases
phenotype
alleles
An organism's genetic make up, or allele combinations, is referred to as
genotype
phenotype
homozygous
heterozygous
If an organism has 2 identical alleles for a trait, what term would you use to describe their genotype?
heteroygous
homozygous
hybrid
multiple alleles
If an organism has the genotype aa,
they are considered
homozygous dominant
heterozygous
homozygous recessive
heterozygous recessive
In cats, having green eyes (G) is dominant to having brown eyes (g). What would be the genotype of a brown eyed cat?
GG
Gg
gG
gg
True or False? 2 organisms with different genotypes can have the same phenotype.
True
False
If an organism reproduces asexually, which of the following statements is correct?
All of the offspring are identical to each other
All of the offspring have the same DNA as the parent
Only one parent's DNA was used to create the offspring
All of the above
If a homozygous tall plant is crossed with a homozygous short plant, what do you predict will be the height of the offspring plants?
tall
short
some tall and some short
medium sized
If an organism has one dominant allele and one recessive allele, they are considered to have a _______ genotype.
homozygous recessive
homozygous dominant
heterozygous
none of the above
What is this diagram called?
Mendel Square
Passman Square
Sutton Square
Punnett Square
In this diagram, what % of the offspring do you expect to show the dominant trait?
100%
75%
25%
0%
How would you describe the parents in this cross?
One homozygous dominant and one homozygous recessive
One heterozygous and one homozygous dominant
One heterozygous and one homozygous recessive
Both parents are heterozygous
Only organisms that are ____________ will show the recessive phenotype.
heterozygous
homozygous dominant
homozygous recessive
none of the above
An allele that is strong and will always be expressed if it is inherited is know as a
super allele
recessive allele
hybrid allele
dominant allele
What happens in meiosis?
new daughter cells are produced that are identical to the parent cell
reproductive cells fuse to create new organisms
reproductive cells are formed that have 1/2 the chromosome number as the parent cell
changes in DNA create traits that were previously not seen in the parent
If an organism has 50 chromosomes in its body cells, how many will be in the reproductive cells (sperm and eggs)?
50
25
100
75
If an egg cell contains 16 chromosomes, how many would you expect to find in the body cells of that organism?
16
8
32
4
When reproductive cells fuse, it is known as __________ .
fermentation
fertilization
fenestration
fomentation
The term for the physical appearance of an organism
genotype
phenotype
homozygous
heterozygous
A cell has 22 chromosomes. After the cell cycle is complete, how many cells will be created? How many chromosomes will be in each cell?
2 cells, 22 chromosomes
4 cells, 11 chromosomes
2 cells, 11 chromosomes
4 cells, 22 chromosomes
Which terms are correctly paired with their synonyms?
purebred; heterozygous
hybrid; homozygous
purebred; homozygous
hybrid; phenotype
What % of offspring would show the recessive trait?
100%
75%
50%
25%
The passing of traits from parents to offspring is known as
genetics
alleles
heredity
probability
