Pedigree

Front

What is a pedigree?

Back

A pedigree is a diagram that shows the occurrence and appearance of phenotypes of a particular gene or organism and its ancestors.

Front

What does a shaded symbol represent in a pedigree?

Back

A shaded symbol typically represents an individual who expresses a particular trait, such as a genetic disorder.

Front

What does a circle represent in a pedigree?

Back

A circle represents a female in a pedigree chart.

Front

What does a square represent in a pedigree?

Back

A square represents a male in a pedigree chart.

Front

What is the difference between a dominant and recessive trait?

Back

A dominant trait only needs one copy of the allele to be expressed, while a recessive trait requires two copies of the allele.

Front

How can you identify carriers of a recessive trait in a pedigree?

Back

Carriers are typically represented by unshaded symbols that have affected offspring.

Front

What is the significance of generations in a pedigree?

Back

Generations in a pedigree show the lineage and inheritance patterns over time.

Front

How can you determine the number of affected individuals in a pedigree?

Back

Count the shaded symbols in the pedigree to determine the number of affected individuals.

Front

What is the role of a pedigree in genetics?

Back

A pedigree helps track the inheritance of traits and can be used to predict the likelihood of traits appearing in future generations.

Front

Can males be carriers of X-linked traits?

Back

No, males cannot be carriers of X-linked traits; they either have the trait or do not have it.