Mendel’s Laws Milestones Review

In certain breeds of dogs, deafness is due to a recessive allele (d) of a particular gene, and normal hearing is due to its dominant allele (D).  What percentage of the offspring of a normal heterozygous (Dd) dog and a deaf dog (dd) would be expected to have normal hearing?

The Punnett square in the figure above shows that the gene for pea shape and the gene for pea color assort seperately from one another.  This is an example of Mendel’s Law of                                                         .

If a corn plant has a genotype of Ttyy, what are the possible genetic combinations that could be present in a single grain of pollen from this plant?

Match the following genotypes with their correct allele letters.

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive.  What are the possible combinations of genes in the offspring of two red-eyed heterozygous flies (Rr)?

If the dominant trait is not present then the                          trait will show.

Fur color in cats is controlled by an autosomal gene that can occur in the dominant form, (B), or the recessive form, (b).  The length of the cat’s fur is controlled by another autosomal gene which occurs in the dominant form, (S), or the recessive form, (s).  The table below shows the traits for these allele codes.

The following genotypes were found in a male cat and a female cat.

BbSs (male)                          bbSS (female)

Which one of the following choices is true of the phenotype of offspring from these parents?

In fruit flies, the gene for red eyes (R) is dominant and the gene for sepia eyes (r) is recessive.  Select ALL of the following that are possible combinations of genes in the offspring of two red-eyed heterozygous flies.  (3 choices)

In carrier pigeons there is a rare inherited condition that causes the death of the chicks before hatching.  In order for this disease to be passed from generation to generation there must be parent birds that

The Punnett square below shows a cross between two rabbits.  Black fur (B) is dominant to brown fur (b).

Match the genotype and phenotype of each offspring with it’s corresponding box number.

A trait for flower color shows incomplete dominance, where heterozygous individuals have pink flowers.  If a homozygous dominant individual were crossed with a heterozygous individual, what percentage of their offspring would exhibit pink flowers?

The Punnett square below shows a cross between two rabbits.  Black fur (B) is dominant to brown fur (b).

Match the genotype and phenotype of each offspring with it’s corresponding box number.

A heterozygous individual (Aa) was crossed with another heterozygous individual (Aa).  Match the following percentages with their corresponding genotypes.

Heredity is the passing of traits from _____________________ to _____________________

If a child has red hair, they inherited a certain _______________ from their parents.

One trait that is ALWAYS present and causes the other traits to disappear is a ________________________

True or False:  Recessive traits are ALWAYS present

Offspring receive two sets of _____________ (one from each parent)

If your genotype is Bb, then you can only pass a B or b to your child but you can’t pass both.  Which Mendel Law is it?

An organism is a hybrid genotype (Tt) but is appears tall instead of short.

If a pea plant’s alleles for height are tt, what is true of its parents?