WorksheetsGenetics
Total questions: 21
Worksheet time: 41mins
Which genotype is homozygous
BbHh
BBHh
BBhh
BbHH
What is the phenotypic ratio of a cross between a heterozygous tall (Tt) and a short (tt) plant?
3 tall plants and 1 short plant
2 tall plants and 2 short plants
4 tall plants
1 tall plant and 3 short plants
What is the name of this diagram?
Chromotype
Phenotype
Gentoype
Karyotype
If a curly haired guinea pig (Hh) is crossed with another curly haired guinea pig (HH), what will the possible genotypes of the offspring be?
HhHH
Hh
hh
HH
Based on the pedigree chart, what can we conclude?
The disease is more common in females.
The disease is recessive
The disease is sex-linked
The disease is expressed in every generation.
A culture of cells is exposed to radiation. Afterwards, many of the cells appear different. What has probably occurred?
mutation
speciation
bacterial infection
contamination
Black fur is dominant to white fur in bears. What genotypes would the parents have to be for the offspring to be all black? (more than one right answer).
Bb x Bb
BB x Bb
BB x bb
bb x bb
Based on the pedigree, which statements shown are correct?
Mom (Gen I) is homozygous recessive.
Dad (Gen I) is homozygous dominant.
Gen. 3 has 1 heterozygous male and one homozygous dominant male.
Gen. 2 contains all heterozygous (carriers).
In incomplete dominance, what is the outcome of a cross between 2 heterozygous (Rr) pink flowers?
2 red, 2 white
1 red, 2 pink, 1 white
4 pink
2 red, 1 pink, 1 white
A genetic pedigree showing that only males are affected by a certain disorder is evidence of
sex-linked inheritance
passive inheritance
dominant inheritance
recessive inheritance
Why does sexual reproduction result in greater diversity among offspring than does asexual reproduction?
Only mitosis must occur in sexual reproduction
New combinations of genes result from sexual reproduction.
Sexual reproduction occurs at a faster rate.
Mutations are caused by sexual reproduction.
In guinea pig fur, long hair (L) and curly hair (C) are both dominant . What would the phenotype be for a guinea pig who was LlCc?
Short, straight hair
Long, straight hair
Long, curly hair
Short, curly hair
Breeding of endangered species often still leads to extinction due to
reduced genetic diversity
increased fertility (offspring)
increase in helpful mutations.
Which of the males is the father of the offspring?
Male 1
Male 2
Male 3
What type of mutation has occurred in this chromosome?
insertion
substitution
deletion
Different forms of a gene are referred to as
autosomes
alleles
chromatids
The chances of developing cancer, diabetes, or sickle-cell anemia are higher if a family member also has the disorder because they are
related to diet
genetically based
passed through blood contact
highly infectious
4
2
6
3
For a mutation to pass to an offspring, it must occur in a
muscle cell
brain cell
bone cell
sex cell
In the following cross TT x TT what ratio of the offspring will be homozygous recessive for the trait of tallness?
0 in 4
1 in 4
2 in 4
4 in 4
An explanation of a body of facts based on substantial evidence that has been repeatedly confirmed through observation and experimentation.
law
theory
hypothesis
