WorksheetsGenetics and Inheritance
Total questions: 28
Worksheet time: 23mins
The man who studied genetics and came up with genetics is
James Watson
Francis Crick
Gregor Mendel
Charles Darwin
The passing of genetic traits from parent to offspring.
heredity
trait
gene
allele
Having two of the same genes for the trait (sometimes called purebred).
homozygous
hetrozygous
protein
chromosome
Having two different genes for a trait (sometimes called hybrid).
protein
homozygous
heterozygous
genotype
In chickens, rose comb (R) is dominant to single comb (r). A homozygous rose-combed rooster is mated with a single-combed hen. All of the chicks in the F1 generation were kept together as a group for several years. They were allowed to mate only within their own group. What is the expected phenotype of the F2 chicks?
100% rose comb
75% rose comb and 25% single comb
100% single comb
50% rose comb and 50% single comb
In mink, brown fur color is dominant to silver-blue fur color. If a homozygous brown mink is mated with a silver-blue mink and 8 offspring are produced, how many would be expected to be silver-blue?
0
3
6
8
Mendel took the pollen from a tall pea plant and pollinated the flower of a short pea plant. When he did this, he removed the male parts of the flower on the short plant. Why was it important that he remove the male parts from the flower of the short plant?
because the short plant was heterozygous
because he wanted to prevent the development of seeds
because he wanted to prevent self pollination
because the short plant was not a true-breeding plant
A series of plants, produced through vegetative propagation, have been planted at different altitudes. The researcher observes that the higher the altitude, the shorter the plant will grow. Please make a hypothesis to explain the results.
Lower altitudes cause mutations in genes that determine height.
The plants at lower altitudes are genetically different from plants at higher altitudes.
Higher altitudes affect the presence of genes that determine height.
Higher altitudes decrease the expression of genes that promote height.
A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is ____.
0%
25%
50%
75%
The law of segregation states: Allele pairs separate during gamete formation and randomly unite at fertilization.
True
False
What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
Principle of independent assortment.
Principle of recessives alleles
Principle of complete dominance.
Principle of incomplete dominance.
What is the relationship between phenotype and genotype?
The phenotype determines the genotype.
The genotype determines the phenotype.
There is no relationship between phenotype and genotype.
