Monohybrid Inheritance (AQA A-Level Biology): Flashcards
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Monohybrid inheritance
Monohybrid inheritance
Pattern of inheritance for a single gene
Alleles
Alleles
Different versions of a gene
Homozygous
Homozygous
Carrying two identical alleles for a gene
Dominant allele function
Dominant allele function
Masks expression of other alleles
Genotype
Genotype
The genetic makeup (alleles present)
Phenotype
Phenotype
Observable characteristics from genotype
What gametes carry from each gene pair
What gametes carry from each gene pair
Only one allele from each gene pair
F₁ phenotype (pure-breeding cross)
F₁ phenotype (pure-breeding cross)
All show dominant phenotype (100%)
F₂ generation phenotypic ratio
F₂ generation phenotypic ratio
(3 dominant : 1 recessive)
Law of segregation
Law of segregation
Allele pairs separate; only one allele per gamete