Front

What is the probability of a child having freckles if both parents are heterozygous for freckles?

Back

75%.

Front

What is the primary reason for differences in height and weight between identical twins raised in different environments?

Back

Each twin was provided a different diet and physical activities.

Front

What type of evidence best supports the claim that birds should be reclassified to share taxonomic groups with dinosaurs?

Back

Evidence showing birds shared a common genetic history with dinosaurs.

Front

What can be inferred if marine worms and mollusks go through similar larval stages during development?

Back

They share a common ancestor.

Front

What is the function of a restriction enzyme?

Back

To cut DNA at a specific nucleotide sequence.

Front

Define dominant trait in genetics.

Back

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

Front

What is the significance of a common ancestor in evolutionary biology?

Back

It indicates that different species have diverged from a shared lineage.

Front

Explain the concept of genetic variation.

Back

Genetic variation refers to the differences in DNA sequences among individuals, which can lead to different traits.

Front

What role do enzymes play in biological processes?

Back

Enzymes act as catalysts to speed up chemical reactions in the body.

Front

Define phenotype.

Back

Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.