Science 7 Post 2 Assessment Practice

Front

What is a dominant trait in genetics?

Back

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

Front

What is a homozygous organism?

Back

A homozygous organism has two identical alleles for a particular gene, either both dominant or both recessive.

Front

What does it mean for a trait to be recessive?

Back

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

Front

What is a common ancestor?

Back

A common ancestor is an organism from which two or more different species have evolved.

Front

What is an adaptation in biology?

Back

An adaptation is a characteristic that has evolved in a species to help it survive and reproduce in its environment.

Front

What is the significance of a four-chambered heart in reptiles?

Back

A four-chambered heart allows for more efficient separation of oxygenated and deoxygenated blood, which is important for higher metabolic rates.

Front

What is selective breeding?

Back

Selective breeding is the process of breeding plants or animals for specific traits to enhance desired characteristics.

Front

What is the role of environmental factors in the physical characteristics of organisms?

Back

Environmental factors can influence the physical characteristics of organisms, leading to variations that may enhance survival.

Front

What is the difference between a phenotype and a genotype?

Back

The phenotype is the observable physical characteristics of an organism, while the genotype is the genetic makeup that determines those traits.

Front

What is the purpose of camouflage in animals?

Back

Camouflage helps animals avoid detection by predators or prey, enhancing their chances of survival.