Monohybrid and Dihybrid Flashcard

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What is the phenotypic ratio when crossing two heterozygous plants for a trait where tall is dominant to short?

Back

75% tall : 25% short.

Front

Define genotype.

Back

Genotype is the letter combination (alleles) that represents a trait in an organism.

Front

What is the probability of offspring having short tusks when a heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant?

Back

50% chance of having short tusks.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles for a trait.

Front

What is the expected genotype ratio from a cross between a homozygous dominant dog and a heterozygous dog?

Back

50% BB (homozygous dominant) and 50% Bb (heterozygous).

Front

What does it mean if an organism is homozygous recessive?

Back

It means the organism has two recessive alleles for a trait.

Front

What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

Front

What is the definition of phenotype?

Back

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

Front

What is the expected phenotypic ratio from a monohybrid cross?

Back

Typically, the phenotypic ratio is 3:1 for dominant to recessive traits.