Monohybrid Cross (Leaving Cert Biology): Flashcards
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13 cards from this deck
Monohybrid cross
Monohybrid cross
Genetic cross between 2 organisms studying 1 gene
F1 generation
F1 generation
First generation offspring of two parents
F2 generation
F2 generation
Second generation offspring of two parents
Progeny
Progeny
Offspring produced from a genetic cross
Symbol for dominant allele
Symbol for dominant allele
Capital letter
Symbol for recessive allele
Symbol for recessive allele
Lowercase letter
Punnett Square
Punnett Square
Grid to predict offspring genotypes and phenotypes
BB x bb F1 genotype
BB x bb F1 genotype
All Bb
BB x bb F1 phenotype
BB x bb F1 phenotype
All show dominant trait (B masks b)
Bb x Bb genotypic ratio
Bb x Bb genotypic ratio
1 BB : 2 Bb : 1 bb
Bb x Bb phenotypic ratio
Bb x Bb phenotypic ratio
3 dominant : 1 recessive
Dominant allele in heterozygous
Dominant allele in heterozygous
Masks the recessive allele
Standard phenotypic ratio (heterozygous cross)
Standard phenotypic ratio (heterozygous cross)
3:1 (dominant:recessive)