Vocabulary
A genotype with 2 of the same alleles (AA or aa) is referred to as ___________
Homozygous
In certain cases, the heterozygous genotype manifests as a 3rd phenotype intermediate to the dominant and recessive (blended). This is referred to as ___________.
Incomplete dominance
Brown (B) is dominant fur over silver-blue fur (b) in minks. If a homozygous brown mink is mated with a silver-blue mink, and 10 offspring are produced, how many will be expected to be silver-blue? Why?
0. In order to be silver-blue, TWO b alleles have to be inherited.
A factor passed from parent to offspring is called a _____
Gene
Alleles separate during meiosis, offspring will inherit one allele for each trait from each parent
Law of segregation
A heterozygous tall plant is allowed to self-pollinate. What are the possible genotypes of the offspring?
The genotypes of the offspring are TT, Tt, tt.
An inheritable characteristic is called a _______
Trait
Genes on different chromosomes will *most likely* be randomly distributed during meiosis
Law of independent assortment
What are the allele combinations of the gametes produced by an individual with a genotype, AaBb?
AB, Ab, aB, ab
The actual genes/genetic code of an organism (such as PP, Pp, or pp) is a ___________
Genotype
Alleles:
Purple (P) white (p)
A pure-breeding purple is cross-pollinated with a pure-breeding white. What genotype will the offsprings have?
Pp (heterozygous)
What are the letters on the outside of the Punnett square?
Alleles of the P generation
The outward expression/physical manifestation of the genes (such as purple flowers or brown hair) is a __________
Phenotype
Alleles:
Purple (P) white (p)
A pure-breeding purple is cross-pollinated with a pure-breeding white. What phenotype will the offsprings have?
Pp (heterozygous)
How many squares would the Punnett square contain for a cross between AaBb x AaBb?
16 squares (dihybrid cross)