Biology Heredity Flashcard

Front

In a Punnett square, a lower case letter stands for a ____________ allele.

Back

recessive

Front

Which of the following is true regarding inheriting traits: Dominant traits are more likely to be expressed because you only need one gene.

Back

True

Front

In animals, shaggy fur is dominant to short fur. What are the genotypes of a shaggy fur animal and a short fur animal?

Back

Ff and ff

Front

The survival of a species depends on its ability to adapt to changes in the environment. How do mutations increase the likelihood that a species will survive?

Back

Mutations are a source of variation in the species.

Front

When alleles are neither dominant nor recessive, and both alleles are expressed in the offspring, this is called _____________.

Back

codominance

Front

What is the term for the genetic makeup of an organism?

Back

genotype

Front

What is the observable physical characteristic of an organism called?

Back

phenotype

Front

What is the term for an allele that masks the effect of another allele?

Back

dominant allele

Front

What is the term for an allele that is masked by a dominant allele?

Back

recessive allele

Front

What is the expected phenotypic ratio of a monohybrid cross between two heterozygous parents?

Back

3:1