Punnett Squares

Front

What are genotypes?

Back

Genotypes are the genetic makeup of an organism, represented by the alleles inherited from its parents.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What is the probability of a child being blue-eyed if both parents are brown-eyed with genotype Bb?

Back

The probability is 25%.

Tags

NGSS.HS-LS4-3

Front

What does the term homozygous recessive mean?

Back

Homozygous recessive refers to having two identical recessive alleles for a trait, such as 'tt' for shortness.

Front

In a heterozygous genotype, which allele is expressed in the phenotype?

Back

The dominant allele is expressed in the phenotype.

Front

What is an example of a homozygous dominant genotype?

Back

An example of a homozygous dominant genotype is 'AA'.

Front

What is a Punnett square used for?

Back

A Punnett square is used to predict the genetic outcomes of a cross between two organisms.

Front

What does the term phenotype refer to?

Back

Phenotype refers to the observable physical or biochemical characteristics of an organism, determined by its genotype.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles are expressed in the phenotype even when only one copy is present, while recessive alleles are only expressed when two copies are present.

Front

How do you determine the genotype of an organism?

Back

The genotype can be determined through genetic testing or by analyzing the organism's offspring.

Tags

NGSS.HS-LS1-1

Front

What is the expected phenotypic ratio from a monohybrid cross of two heterozygous parents (Tt x Tt)?

Back

The expected phenotypic ratio is 3:1, with three tall plants for every one short plant.