2nd Quarterly Review

Front

What is genetic diversity?

Back

Genetic diversity refers to the variety of genes within a species, which allows for adaptability and survival in changing environments.

Front

What is co-dominance in genetics?

Back

Co-dominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What are the three main components of a nucleotide?

Back

A nucleotide consists of a 5-carbon sugar, a phosphate group, and a nitrogen base.

Front

What is a Punnett square used for?

Back

A Punnett square is a diagram that predicts the genotypes of offspring from a cross between two parents.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.

Front

Define a gene.

Back

A gene is a segment of DNA that contains the instructions for building a specific protein or set of proteins.

Front

What is the role of chromosomes in genetics?

Back

Chromosomes are structures within cells that contain DNA and carry genetic information.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a blended phenotype.

Front

What is a phenotype?

Back

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

Front

What is the significance of mutations in genetics?

Back

Mutations are changes in the DNA sequence that can lead to variations in traits and can contribute to evolution.