Genotype and Phenotype Basics

Front

What does the symbol represent for an unaffected female in a pedigree chart?

Back

An unaffected female is represented by a circle that is not filled in.

Front

What is homozygous dominant?

Back

An organism with two identical dominant alleles for a trait, e.g., MM.

Front

What is homozygous recessive?

Back

An organism with two identical recessive alleles for a trait, e.g., rr.

Front

What is the study of heredity called?

Back

Genetics.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Front

What are long strands of DNA called?

Back

Chromosomes.

Front

What is a phenotype?

Back

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

Front

What is a genotype?

Back

The genetic constitution of an individual, represented by alleles.

Tags

NGSS.HS-LS3-2

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present, while recessive alleles require two copies to express their trait.

Front

What is an allele?

Back

An alternative form of a gene that can exist at a specific locus on a chromosome.

Front

What is a Punnett square used for?

Back

To predict the genotypes and phenotypes of offspring from a genetic cross.

Tags

NGSS.HS-LS4-3