Understanding Inheritance

Front

What is a homozygous recessive genotype?

Back

A homozygous recessive genotype consists of two identical recessive alleles, represented as 'bb' in the case of hair color, where 'b' represents the allele for blonde hair.

Front

What is a genotype?

Back

A genotype is the genetic makeup of an organism, represented by two alleles for a trait, such as 'BB', 'Bb', or 'bb'.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is polygenic inheritance?

Back

Polygenic inheritance occurs when multiple sets of alleles influence a single trait, resulting in a range of phenotypes, such as skin color.

Tags

NGSS.HS-LS3-3

Front

How are alleles represented in a genotype?

Back

Alleles in a genotype are represented by letters, where each letter corresponds to a specific allele.

Front

What is a pedigree?

Back

A pedigree is a diagram that shows the phenotypes of genetically related family members, illustrating inheritance patterns.

Front

What is the difference between phenotype and genotype?

Back

Phenotype refers to the observable traits of an organism, while genotype refers to the underlying genetic makeup.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygous genotype are fully expressed, resulting in a phenotype that displays both traits.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where the phenotype of a heterozygote is intermediate between the phenotypes of the two homozygotes.

Front

What is a Punnett square?

Back

A Punnett square is a diagram used to predict the genotypes and phenotypes of offspring from a genetic cross.

Tags

NGSS.HS-LS3-3

Front

What is the significance of dominant and recessive alleles?

Back

Dominant alleles mask the effect of recessive alleles in a heterozygous genotype, determining the phenotype.