SC Biology EOC Pretest

Front

What is the expected phenotypic ratio of a cross between two heterozygous rose plants (Rr x Rr) where red flower color is dominant?

Back

75% red flowers, 25% white flowers.

Front

What causes the structural differences between a tadpole and an adult frog?

Back

Different sets of genes expressed at each stage of development.

Front

What condition must be true for exponential population growth to continue?

Back

The resources in the environment must be unlimited.

Front

In the equation X + H2O --> Y + O2, what does Y represent in the process performed by chloroplasts?

Back

Glucose.

Front

In a population of 120 oak trees, if 25% have oak wilt disease, how many trees are affected?

Back

30 trees.

Front

What is the definition of a 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 role of chloroplasts in plant cells?

Back

Chloroplasts perform photosynthesis, converting light energy into chemical energy in the form of glucose.

Front

Define phenotype in the context of genetics.

Back

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

Front

What is the significance of gene expression in development?

Back

Gene expression determines which proteins are produced in a cell, influencing the cell's function and the organism's development.

Front

What is the formula for calculating the percentage of a population with a certain trait?

Back

(Number of individuals with the trait / Total population) x 100.