Genetics- Unit 5 Test Review

Front

What is a dominant trait?

Back

A dominant trait is a genetic trait that is expressed in the phenotype even when only one copy of the allele is present.

Front

What is a recessive trait?

Back

A recessive trait is a genetic trait that is only expressed in the phenotype when two copies of the allele are present.

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

Front

What does homozygous mean?

Back

Homozygous refers to having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is a karyotype?

Back

A karyotype is a visual representation of an individual's chromosomes, organized by size and shape.

Front

What can a karyotype tell you?

Back

A karyotype can reveal chromosomal abnormalities, such as trisomy or monosomy, and can indicate the gender of an individual.

Front

What is trisomy?

Back

Trisomy is a genetic condition where an individual has three copies of a particular chromosome instead of the usual two.

Front

What is monosomy?

Back

Monosomy is a genetic condition where an individual has only one copy of a particular chromosome instead of the usual two.

Front

What is the significance of the X and Y chromosomes?

Back

The X and Y chromosomes determine an individual's sex, with XX typically being female and XY being male.