Probability of Autosomal Recessive Traits

The video tutorial explains the probability of a child manifesting an autosomal recessive trait. It begins with an introduction to the problem, followed by a detailed explanation of genotypes for parents and affected individuals. The instructor uses a Punnett square to calculate the probability of offspring being heterozygous or affected. The final section provides the calculated probability and concludes the problem, with closing remarks inviting viewers to subscribe.

What is the main focus of the problem discussed in the video?

• Exploring the effects of environmental factors on genetics

• Understanding the inheritance of X-linked traits

• Calculating the probability of a child manifesting an autosomal recessive trait

• Determining the probability of a child having a dominant trait

What is the genotype of the parents if the trait is autosomal recessive?

• Homozygous recessive

• Homozygous dominant

• Heterozygous

• Hemizygous

Why do we assume individuals marrying into the family are genetically normal?

• To simplify calculations

• To ensure all offspring are affected

• Because the trait is rare

• Because the trait is common

What is the probability that all children of the couple are heterozygous?

• 0%

• 25%

• 50%

• 100%

How do we calculate the probability of the mother being heterozygous?

• By observing phenotypes

• Using a pedigree chart

• Using a Punnett square

• By genetic testing

What is the probability of the daughter receiving a recessive allele from her mother?

• 0%

• 25%

• 50%

• 75%

What is the final probability of the couple having an affected child?

• 1/4

• 1/6

• 1/12

• 1/8