Heredity

Traits are determined by a single gene with two alleles.

Phenotypic ratios always follow a 3:1 pattern.

Inheritance patterns are more complex than simple dominant and recessive relationships.

Each gene has only one possible version.

Simple dominant and recessive traits

Traits following a 3:1 phenotypic ratio

Sex-linked traits

Traits determined by one gene

Two, always less than two

Three, only two

Two, multiple

One, two

Non-Mendelian inheritance always results in a 3:1 phenotypic ratio.

Non-Mendelian inheritance often leads to more varied phenotypic ratios due to factors like multiple alleles.

Non-Mendelian inheritance results in the same phenotypic ratios as Mendelian inheritance.

Non-Mendelian inheritance only affects genotypic ratios, not phenotypic ratios.

Only two versions of a gene.

More than two versions of a gene for a particular trait.

Genes that control multiple traits.

Alleles that are always dominant.

Multiple alleles involve only two phenotypes, while Mendelian inheritance involves more.

Multiple alleles involve more than two alleles for a trait, while Mendelian inheritance typically involves two.

Multiple alleles always result in a 3:1 phenotypic ratio, while Mendelian inheritance does not.

Multiple alleles are always dominant, while Mendelian inheritance involves dominant and recessive alleles.

By decreasing the number of possible genotypes.

By providing more combinations of alleles, leading to more diverse traits.

By limiting the expression of certain genes.

By making all alleles dominant.

There are only two alleles present.

There are exactly four alleles present.

There are at least three alleles present.

There is only one allele present.

I^A

I^B

i

Both I^A and I^B

I^A is dominant to I^B

I^B is dominant to I^A

They are codominant

They are both recessive