Genetics Flashcards
(53 cards)
A unit that determines heritable characteristics
Gene
Organisms that always produce offspring identical to parents
True- breeding
The offspring of two different varieties
Hybrid
When two different alleles of a pair are different, the one is masked
Recessive
An incorrect idea that acquired characteristics are passed on
Pangenesis
Parent organisms that are mated
P generation
A diagram that shows possible combinations of gametes
Punnett square
A breeding experiment that uses parents different in one characteristic
Monohybrid cross
One of the alternative forms of a gene for a characteristic
Allele
Relative numbers of organisms with various characteristics
Phenotypic ratio
An organism that has two different alleles for a characteristic
Heterozygous
Old idea that heredity materials from parents mix into offspring
Blending
An organisms genetic make up
Genotype
Separation of allele pairs that occurs during gamete formation
Segregation
Fertilization of a plant by pollen from a different plant
Cross- Fertilization
An organism that has two identical alleles for a characteristic
Homozygous
Offspring of the P generation
F1 generation
A characteristic most commonly found in nature
Wild type
What an organism looks like; its expressed traits
Phenotype
Offspring of the F1 generation
F2 generation
When pollen fertilizes eggs from the same flower
Self fertilization
A hybridization
Cross
When two alleles of a pair are different, the one expressed
Dominant
Where genes for a certain trait are located
Homologous chromosomes
