Mendelian Genetics

Front

What is Mendelian Genetics?

Back

Mendelian Genetics is the study of how traits are inherited through the actions of alleles, based on the principles established by Gregor Mendel.

Front

What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is a genetic trait that is only expressed in the phenotype when two copies of the allele are present.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene, either dominant or recessive.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is a Punnett square?

Back

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

Front

What do the letters on the top and side of a Punnett square represent?

Back

The letters represent the possible alleles contributed by each parent following meiosis.

Front

What is the expected phenotypic ratio in a monohybrid cross?

Back

The expected phenotypic ratio in a monohybrid cross is typically 3:1 for dominant to recessive traits.

Front

What is codominance?

Back

Codominance is a form of inheritance where both alleles in a heterozygote are fully expressed, resulting in a phenotype that is neither dominant nor recessive.

Front

What are the genotypes for red, white, and speckled carnations in codominance?

Back

Red = RR, White = WW, Speckled = RW.