genetics

What is a recessive allele?

This version of an allele is not expressed when in the presence of a dominant allele.

What is homozygous?

Describes when the trait is composed of two identical alleles.

What is codominance?

This occurs when both alleles are fully expressed.

What is incomplete dominance?

This occurs when neither allele is fully dominant

What shape denotes a woman in a pedigree chart?

A circle.

What is phenotype?

Refers to physical appearance rather than variables.

What are alleles?

Different forms of a gene.

What are sex-linked traits?

Traits carried on the X chromosome.

What is a Punnett square?

This diagram predicts inheritance patterns.

Known as the father of genetics; Mathematician that discovered how inheritance worked, using experiments such as breeding flowers

Gregor Mendel.

How many pairs of chromosomes do humans usually have in every cell?

23

What is a pedigree?

Analyzing and logging information that tracks inheritance.

What is a phenotypic ratio?

Number of offspring relative to different physical traits after genetic crossing with parents.

What are autosomes?

Chromosomes in the human body that do not determine sex.

What is hemophilia?

A sex-linked disorder passed down by Queen Elizabeth that has certain carriers.

What is Trisomy 21?

A genetic condition caused by a third copy of the 21st chromosome.

What is Duchenne Muscular Dystrophy?

A muscular dystrophy that affects mainly boys due to its X chromosome recessive inheritance pattern.