WorksheetsGenetics Review
Total questions: 17
Worksheet time: 4hrs 15mins
B = brown eyes; b = blue eyes
If a heterozygous brown eyed female is crossed with a blue eyed male, what is the chance they will have a child with blue eyes?
0%
25%
50%
75%
100%
R = round eyes; r = almond eyes.
If the heterozygous genotype shows the dominant phenotype, what type of dominance is this?
Complete dominance
Incomplete dominance
Codominance
F = freckles; f = no freckles
If a couple who both has freckles has 4 children and all 4 children have freckles, what are the possible genotypes of the mother and father? Choose ALL of the possible answers.
FF x FF
Ff x Ff
FF x Ff
ff x ff
FF x ff
B = black feathers; b = white feathers.
The heterozygous genotype gives blue feathers. What type of dominance is this?
Complete dominance
Incomplete dominance
Codominance
B = black feathers; b = white feathers.
The heterozygous genotype gives blue feathers. What are the genotypic and phenotypic ratios if a bird with black feathers is crossed with a bird with blue feathers?
Genotypic ratio: BB = 50%, Bb = 50%
Phenotypic ratio: Black = 100%
Genotypic ratio: Bb = 100%
Phenotypic ratio: Black = 100%
Genotypic ratio: BB = 50%, Bb = 50%
Phenotypic ratio: Black = 50%, Purple = 50%
Genotypic ratio: BB = 50%, Bb = 25%, bb = 25%
Phenotypic ratio: Black = 50%, Purple 25%, White = 25%
A heterozygous blood Type A woman is crossed with a man with blood Type AB. What are the chances of having a child with Type B blood?
0%
25%
50%
75%
100%
Blood types in humans is an example of what type of dominance?
Complete dominance
Incomplete dominance
Codominance
R = normal; r = muscular dystrophy
Muscular dystrophy is a recessive sex-linked trait. What are the genotypic and phenotypic ratios of a cross between a woman who is a carrier and a healthy man?
Genotypic Ratio: XRXR = 25%, XRXr = 25%, XRY = 25%, XrY = 25%
Phenotypic Ratio: Healthy = 75%, Muscular Dystrophy = 25%
Genotypic Ratio: XRXR = 50%, XrY = 50%
Phenotypic Ratio: Healthy = 50%, Muscular Dystrophy = 50%
Genotypic Ratio: XRXr = 50%, XrY = 50%
Phenotypic Ratio: Healthy = 100%
Genotypic Ratio: XRXR= 50%, XrY = 25%, XRY = 25%,
Phenotypic Ratio: Healthy = 75%, Muscular Dystrophy = 25%
Baldness is a recessive sex-linked trait. What are the chances of having a child who will bald between a healthy carrier woman and a man who is balding? Will this child be a daughter or a son? Use the letter "B."
50% chance - son only
50% chance - daughter only
50% chance - son or daughter
In complete dominance, which of the following genotypes would give a dominant phenotype? Choose ALL of the possible answers.
BB
Bb
bB
bb
FF
Which of the following genotypes would give a recessive genotype? Choose ALL of the possible answers.
ff
fF
bB
bb
FF
Which of the following statements is true?
Mitosis creates 2 genetically different daughter cells; meiosis creates 4 genetically identical daughter cells.
Mitosis has 2 rounds of division; meiosis only has 1 round of division.
Mitosis creates diploid cell; meiosis creates haploid cells.
Mitosis creates somatic cells and gametes; meiosis only creates gametes.
Why is this process important?
It creates less genetic diversity.
It creates more genetic diversity.
It makes sure that our genetic information is not exchanged.
It makes sure that our cells are dividing properly.
If a parent cell has 88 chromosomes, after meiosis, each new daughter cell will have ____ chromosomes.
22
44
66
88
This karotype belongs to a _____.
male
female
What is the cause of this person's abnormal karotype?
Nondisjunction during meiosis led to a gamete with 22 chromosomes.
Nondisjunction during meiosis led to a gamete with 24 chromosomes.
Nondisjunction during mitosis led to a gamete with 22 chromosomes.
Nondisjunction during mitosis led to a gamete with 24 chromosomes.
Why are males more likely to get sex-linked traits, such as color-blindness and balding, then females?
Because men have 2 X chromosomes.
Because men have 1 X and 1 Y chromosome.
Because men have 2 Y chromosomes.
