AJH Pedigree Review 2

Front

What is a genotype?

Back

The genotype is the genetic constitution of an individual, represented by the alleles inherited from the parents.

Front

What does 'rr' represent in genetics?

Back

'rr' represents a homozygous recessive genotype, meaning both alleles are recessive.

Front

What is a pedigree chart?

Back

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

Front

How do you determine the number of generations in a pedigree?

Back

Count the horizontal rows in the pedigree chart, with each row representing a generation.

Front

What is the significance of Roman numerals in pedigree charts?

Back

Roman numerals are used to denote generations in a pedigree chart, with I being the oldest generation.

Front

What does 'II-8' indicate in a pedigree?

Back

'II-8' indicates the 8th individual in the second generation of the pedigree.

Front

How can you identify relationships in a pedigree?

Back

Relationships can be identified by analyzing the connections between individuals, such as parents to offspring or siblings.

Front

What does it mean if an individual is labeled as 'III-5'?

Back

'III-5' refers to the 5th individual in the third generation of the pedigree.

Front

How do you count the number of females in a generation?

Back

Count the individuals labeled as females in that specific generation of the pedigree.

Front

What is the role of a grandparent in a pedigree?

Back

A grandparent is the parent of an individual's parent, representing one generation above.