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What is incomplete Dominance

Incomplete dominance is when neither allele is fully dominant, so the heterozygous trait shows a blended (intermediate) phenotype.

What is Genotypic

Genotypic refers to the genetic makeup (alleles) of an organism—like BB, Bb, or bb.

What is Phenotypic

Phenotypic refers to the observable traits or physical appearance of an organism from the combination of inherited alleles—like eye color, height, or flower color.

What is incomplete dominance and what letters do it use?

hen neither allele is fully dominant, so the heterozygous organism shows a blended (intermediate) trait. -

• RR = red

• WW = white

• RW = pink (incomplete dominance)

How is Incomplete Dominance noticed?

Incomplete dominance is noticed when the heterozygous offspring shows a blended or intermediate trait that is different from either parent.

Codominance and what letter do it use?

both alleles are fully and equally expressed in the heterozygous organism, so both traits show at the same time instead of blending. - CAPITAL ONLY.

How is Codominance noticed? ex?

Codominance is noticeable when both alleles are fully shown at the same time in the phenotype—no blending. ex: the spotted cow. has both brown and white fur. codominance.

Polygenic traits? ex?

Polygenic traits are traits controlled by many genes working together, not just one gene.

Instead of just “either/or,” polygenic traits show a spectrum (many different levels).

• Human height

• Skin color

• Eye color (in part)

Multiple allele traits

Multiple alleles means a trait is controlled by more than two possible alleles in a population, but each person still only gets two alleles (one from each parent).

Example:

• Blood type in humans: IA, IB, i

Blood types

IA, IB, I

Why are sex-linked traits more common in males?

Because males have only one X chromosome, so any recessive allele on the X is expressed since there is no second X to mask it.

what are sex linked chromosomes?

Sex-linked traits are traits controlled by genes located on the sex chromosomes (usually the X chromosome), where females have two copies of the gene and males have one copy.

What determines your traits?

The combination of alleles you inherit determines your traits.

connection between chrosomes, genes, alleles, and traits

• Chromosomes hold genes.

• Genes have instructions for traits.

• Alleles are variations of those instructions.

• Traits are the physical expression of those genes.