The observable characteristics as expressed by the genes (or genotype).
100
The variations of a specific gene.
alleles
100
A diagram used to show possible genetic combinations.
Punnett Squares
100
Alleles that display equal power in determining phenotype.
codominant
100
What is inbreeding?
The mating of two closely related animals.
200
What is heredity?
The transmission of genetic traits from parent to offspring.
200
An allele that can mask, or hide, the presence of another allele.
dominant
200
The presence of two different alleles on the same gene for one trait.
heterozygous
200
Incomplete dominance is a condition in which...
both alleles influence the phenotype, causing a blended appearance.
200
What are the benefits of inbreeding?
include the ability to magnify certain traits.
300
Describe Mendel's pea plant experiments.
Mendel cross-pollinated certain pea plants in order to observe the offspring of that cross.
300
An allele that can be masked, or hidden, by the presence of another allele.
recessive
300
A record that shows a family tree and family inheritance patterns.
pedigree
300
White roses are crossed with red roses. The alleles for red and white roses show incomplete dominance. The allele for red is R and the allele for white is W. Complete the cross of a red and white rose. Describe the resulting phenotype.
They will have a blended appearance due to incomplete dominance. They will have pink roses.
300
What are the problems of inbreeding?
More genetic defects appearing in the phenotype because the animals are too closely related.
400
List one conclusion he made about genetics.
He discovered that sometimes tall plants produce short plants.
400
An organism that has two different alleles for a particular trait.
Hybrid
400
The allele for black hair (B) in rabbits is dominant over the allele for white hair (b). Write the two possible genotypes for a black-haired rabbit and the genotype for a white haired rabbit.
black- BB or Bb
white- bb
400
Give the definition of incomplete dominance. Give an example.
Incomplete dominance blends the appearance of the two phenotypes. Incomplete dominance has one allele for red, one for white, and the flower appears pink.
400
Cross of two homozygous recessive parents.
bb,bb,bb,bb
500
List the second conclusion he made about genetics.
Crossing two short plants always yielded short plants.
500
Definition of dominance. Give an example.
Dominance completely masks a recessive trait. Dominance has one allele for tall, one for short, and the organism appears tall.
500
Complete the cross of a white-haired (b) female rabbit with a black-haired (B) heterozygous male rabbit. What percentage of the offspring would be black-haired? White haired?
black-50%
white-50%
500
Give the definition of codominance. Give an example.
Codominance allows for both alleles to appear equally in the phenotype. Codominance has one allele for black hair, one for white hair, and the organism has patches of black and white.
500
Cross of a homozygous dominant mother, with a heterozygous father.