11 Agricultural Science T1 Week 10

Genotype

genetic characteristic formed by alleles (Bb Tt)

Allele

variety of gene that codes for a trait (B,b)

Phenotype

physical characteristics

Dominant Allele

written in capital, override recessive gene (Bb)(TT)

Recessive Allele

only seen when both alleles are recessive gene (bb)(tt)

Dihybrid Cross

two hybrids produce offspring

Polygenetic Inheritance

inherited by more than one set of alleles

Hybrid vigor/heterosis

a hybrid better equipped against disease

Heritability

effect of the ability of parent traits to offspring

Hybrid

cross of breeds

Purebred

same breed from each generation to make a pure blood line

Homozygous

same alleles (BB)(bb)

Heterozygous

different alleles (Bb)

Selection

choosing animals

Selection Differential

is the measure of superiority of selected group over the group before selection was made

Gamete

a reproductive cell

Gene

unit of heredity from parent to offspring

Chromosome

carries genetic information

Process of punnet squares

1. Genotypes, 2. Gametes, 3. Punnet square, 4. Phenotypic Ratio, 5. Genotypic Ratio, 6. Outcome

F1, F2, F3

first generation, second generation, third generation