Heredity practice #2

Front

What is the definition of genotype?

Back

The genetic makeup of an organism, represented by the alleles it possesses.

Tags

NGSS.HS-LS1-1

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene (e.g., AA or aa).

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene (e.g., Aa).

Front

What type of letters represent dominant traits?

Back

Capital letters (e.g., A, B).

Front

What type of letters represent recessive traits?

Back

Lower-case letters (e.g., a, b).

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What is the phenotype?

Back

The observable physical characteristics of an organism, determined by its genotype.

Front

What is the difference between homozygous dominant and homozygous recessive?

Back

Homozygous dominant has two dominant alleles (e.g., AA), while homozygous recessive has two recessive alleles (e.g., aa).

Front

If long hair is a dominant trait, what are the possible genotypes for a guinea pig with long hair?

Back

Homozygous dominant (HH) or heterozygous (Hh).

Tags

NGSS.HS-LS3-1

Front

What is the significance of a recessive allele?

Back

A recessive allele is only expressed in the phenotype if two copies are present (e.g., aa).