Question

Genetic cross - what is monogenic inheritence, rules of genetic crosses (using examples of homo and hetero crosses)

Accepted Answer

monogenic inheritence is where inheritance of single gene shown

Rules of genetic cross

state phenotype of both parents
state genotype of both parents (e.g Aa)
state gametes of each parent (e.g A and a and circle them)
punnet square and state proportion of each genotype
state corresponding phenotype for all possible genotypes

Homozygous and heterozygous crosses

homo dominant and homo recessive form heterozygous offspring (100% has phenotype of dominant allele)

take 2 hetero offspring, and you get 25% homo dominant, 50% hetero and 25% homo recessive, so 25% chance of recessive trait being displayed

Homo State Genetic Hetero Phenotype Cross Monogenic Rules