Amoeba Sisters Alleles and Genes

Front

What are dominant traits?

Back

Dominant traits are traits that always show up in an organism's phenotype when at least one dominant allele is present.

Front

How many pairs of chromosomes do humans have?

Back

Humans have 23 pairs of chromosomes, for a total of 46 chromosomes.

Front

What is phenotype?

Back

Phenotype is the physical expression of a trait in an organism.

Front

What is a gene?

Back

A gene is a segment of DNA that codes for a specific trait.

Front

What is a recessive trait?

Back

A recessive trait is expressed only if no dominant version of the trait is present.

Front

What is an allele?

Back

An allele is a variant form of a gene that can result in different traits.

Front

What is genotype?

Back

Genotype is the genetic makeup of an organism, representing the alleles it possesses.

Front

What is the difference between homozygous and heterozygous?

Back

Homozygous means having two identical alleles for a trait, while heterozygous means having two different alleles for a trait.

Front

What is a chromosome?

Back

A chromosome is a long strand of DNA that contains many genes.

Front

What is the role of DNA in genetics?

Back

DNA carries the genetic information necessary for the growth, development, and reproduction of organisms.