GCSE Biology - Family Trees / Family Pedigrees #74

The video tutorial explains family pedigrees, focusing on cystic fibrosis, a recessive inherited disorder. It covers genotypes and alleles, illustrating how to interpret family trees and symbols. The tutorial also demonstrates using Punnett squares to calculate the probability of inheriting cystic fibrosis, emphasizing the importance of understanding genotypes and carriers.

What does it mean for cystic fibrosis to be a recessive inherited disorder?

How are the alleles for cystic fibrosis represented in a family pedigree?

What is the genotype of a person who is a carrier of cystic fibrosis?

In a family pedigree, what do circles and squares represent?

What does a half-shaded shape indicate in a family pedigree?

How can you determine the chance of a child having cystic fibrosis using a Punnett square?

What is the chance of Lucy and Jack's baby having cystic fibrosis?