What is a monohybrid Cross?

Answer 1

The crossing of two heterozygotes for one trait. #Aa xx Aa#

A 1:2:1 AA:Aa:aa genotypic ratio (homozygous dominant:heterozygous:homozygous recessive) is always the result.

In mendelian genetics, It always yields a phenotypic ratio of 3:1 dominant trait:recessive trait. It is not to be confused with a dihybrid cross, which involves crossing two heterozygotes for two traits (#AaBb xx AaBb#)

The phenotypes can vary, but the genotypic ratio remains constant at 1:1:2.

The phenotypic ratio will be 1:2:1 if the alleles are incompletely dominant. Red and white roses are an example of this; RR is red, WW is white, but RW is pink, a third phenotype exclusive to heterozygotes.

For codominant alleles, the situation is similar, but instead of mixed phenotypes, both are expressed.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer 2

Eli Ayoub

A monohybrid cross is a genetic cross between individuals that differ in only one trait or one gene locus. It is used to study the inheritance of a single trait and involves crossing two individuals that are heterozygous for that trait.

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.