+
Related Flashcards
Cards In This Set
| Front | Back |
|
True breeding
|
If an organism has a certain characteristic that is always passed on to its offspring, this organism bred true with respect to that characteristic
|
|
Allele
|
One of a pair of genes that occupies the same position on homologous chromosomes
|
|
Genotype
|
Two-letter set that represents the alleles an organism possesses for a certain trait
|
|
Phenotype
|
The observable expression of an organism's genes
|
|
Homozygous genotype
|
A genotype in which both alleles are identical
|
|
Heterozygous genotype
|
A genotype with two different alleles
|
|
Dominant allele
|
An allele that will determine phenotype if just one is present in the genotype
|
|
Recessive allele
|
An allele that will not determine the phenotype unless the genotype is homozygous in that allele
|
|
Mendel's principles of genetics using updated terminology
|
A. the traits of an organism are determined by its genes
|
|
Mendel's principles of genetics - continued
|
B. each organism has two alleles that make up the genotype for a given trait
|
|
Mendel's principles of genetics - continued
|
C. in sexual reproduction, each parent contributes ONLY ONE of its alleles to the offspring
|
|
Mendel's principles of genetics - continued
|
D. in each genotype, there is a dominant allele. If it exists in an organism, the phenotype is determined by that allele
|
|
Pedigree
|
A diagram that follows a particular phenotype through several generations
|
|
Monohybrid cross
|
A cross between two individuals, concentrating on only one definable trait
|
|
Dihybrid cross
|
A cross between two individuals, concentrating on two definable traits
|
