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WorksheetsPart 1 PreTake Genetics Practice
Total questions: 30
Worksheet time: 3600secs
The process of meiosis helps create new...
proteins
gametes
somatic cells
body cells
The cell cycle and mitosis helps an organism grow larger or regrow body parts. What kind of cells are produced?
egg cells
gametes
somatic cells
sex cells
Cells that only contain one allele for a trait instead of two are considered...
haploid cells
diploid cells
brain cells
body cells
Cells that contain a complete set of genetic instructions (2 alleles for each trait) are considered...
Diploid
Haploid
Gametes
Sperm Cells
The brain cells of a mouse contains 40 chromosomes, how many chromosomes would be in a mouse sperm cell?
20
40
80
Blue whales have 22 chromosomes in their haploid cells. How many would you expect in a diploid cell?
11
22
44
Which process does not increase genetic variation in a population?
crossing over
genetic mutations
sexual reproduction
asexual reproduction
The spider plant in the picture has used asexual reproduction to produce offspring. The cells of the offspring will contain..
DNA that is genetically identical to the parent
half the number of chromosomes as the parent cells
new genes that code for building different proteins
A combination of genetic instructions from two parent sex cells
Which statement does not describe sexual reproduction?
requires 2 parents
combines gametes
decreases genetic diversity
joins egg and sperm cells
Which of the following is considered a homozygous dominant genotype?
HH
Hh
hh
Which of the following is considered a homozygous recessive genotype?
hh
HH
Hh
Which of the following is considered a heterozygous genotype?
HH
Hh
hh
Match the following terms and examples
Heterozygous
Bb
Homozygous Dominant
BB
Homozygous Recessive
bb
Dominant Allele
B
Recessive Allele
b
Which statement is accurate about this Punnett square?
Both parents are homozgous for this trait
There is a 25% chance the offspring will have the dominant trait
The genotypic ratio is
1:2:2
The offspring could have the recessive trait
In peas round is the dominant allele and wrinkled is the recessive allele. Which statement correctly describes the offspring produced from this cross?
25% will be round
50% will be wrinkled
75% will be round
100% will be wrinkled
In peas round is the dominant allele and wrinkled is the recessive allele. Which statement correctly describes the offspring produced from this cross?
25% will be wrinkled
50% will be round
75% will be wrinkled
100% will be round
Which genotypes represent the following scenario?
If two birds heterozygous for the long beak trait (B) are crossed...
BB x Bb
BB x BB
bb x bb
Bb x Bb
Which genotypes represent the following scenario?
A heterozygous pea plant is crossed with a pea with the short recessive trait..
Tt x tt
TT x tt
TT x Tt
Tt x Tt
Frogs have 26 chromosomes in their body cells. How many would you expect in a cell produced by meiosis
13
26
52
Frogs have 26 chromosomes in their body cells. How many would you expect in a cell produced by mitosis
13
26
52
Which genotypes represent the following scenario?
Two birds with long beaks have offspring. One of them has the heterozygous instructions and the other is homozygous for the trait
BB x Bb
Bb x bb
bb x bb
Bb x Bb
Both alleles are visible in the red and white petals on this offspring. This is an example of...
incomplete dominance
complete dominance
codominance
This image models...
incomplete dominance because the red and blue blend together
complete dominance because the recessive instruction is hidden in the offspring
codominance because neither allele is dominant. Both phenotypes show
This image models...
incomplete dominance
complete dominance
codominance
This image models...
incomplete dominance because the heterozygous trait shows a blend of the two fur colors
complete dominance because the dominant trait hides the recessive color
codominance because both black and brown fur is visible
What ratio would represent the possible outcomes of a cross between two speckled chickens
(Hint: Draw a Punnett Square)
1: White
2: Black
1: Speckled
4: Speckled
2: Black
2: Speckled
1: White
2: Speckled
1: Black
What ratio would represent the possible outcomes of a cross between a white chicken and a black chicken?
(Hint: Draw a Punnett Square)
1: White
2: Black
1: Speckled
4: Speckled
2: Black
2: Speckled
1: White
2: Speckled
1: Black
A heterozygous pea plant is crossed with a pea with the short recessive trait.
What is the probability that the offspring will have the tall trait?
0%
25%
50%
75%
100%
Two mice heterozygous for dark fur have offspring. What is the ratio of dark to light mice?
3 dark: 1 light
1 dark: 3 light
2 dark: 2 light
0 dark: 4 light
Which result is an accurate statement about this dihybrid cross
9 results are dominant for both traits
6 results are heterozygous for both traits
1 result is dominant for both traits
4 results are recessive for both traits
