## What is the probability that IV 4 will have condition B?

Answer: The probability that IV-4 will have condition A is 1/36. The probability that IV-4 will have condition B is 1/2.

## What is the probability that both John and Sue are carriers?

The overall chance, therefore, that both John and Sue are carriers would be (2/3) x (1/2). This would be 33.3%.

What is pedigree in genetics?

A pedigree is a genetic representation of a family tree that diagrams the inheritance of a trait or disease though several generations. The pedigree shows the relationships between family members and indicates which individuals express or silently carry the trait in question.

### How do you create a family pedigree?

Instructions on How to Draw a Pedigree

1. Write the person’s first name, or initials below the symbol.
2. Write the person’s current age below the symbol.
3. Indicate the disease or disorder the individual has along with the age of onset below the symbol.
4. Next, draw the person’s parents.

What is the role of probability in genetics?

Probability is a method used to predict the likelihoods of uncertain outcomes. It is important for the field of genetics because it is used to reveal traits that are hidden in the genome by dominant alleles.

## What are the rules of pedigree?

Pedigree Analysis Rules. An affected person married to a “normal” person should have approximately 50% of the offspring being affected. (Also indicates that the affected individual is heterozygous). Distribution of the trait should be close to equal distribution among the sexes.

## What is a pedigree analysis?

pedigree analysis n. The study of an inherited trait in a group of related individuals to determine the pattern and characteristics of the trait, including its mode of inheritance, age of onset, and phenotypic variability.

What is a recessive pedigree?

An individual in the pedigree will be affected (express the phenotype associated with a trait) when the individual carries at least one dominant allele of a dominant trait, or two recessive alleles of a recessive a trait. 2. Rare-in-Population. In each problem, the trait in question is rare in the general population.

A “pedigree” is a genetic representation of a family tree. Usually in the form of a diagram, it shows the inheritance of a trait or disease through several generations.