Probability of Genetic Outcomes

This video tutorial by Nicko covers various probability questions related to genetics, focusing on the likelihood of different phenotypes in children. It includes detailed calculations for ordered and unordered phenotypes, the probability of all children being normal, and the chance of at least one child being albino. The tutorial aims to prepare students for exam questions on these topics.

What percentage of probability questions does the video aim to cover?

• 60%

• 50%

• 80%

• 70%

If both parents are heterozygous, what is the probability that their first child will be phenotypically normal?

• 3/4

• 1

• 1/2

• 1/4

How do you calculate the probability of multiple independent events occurring in a specific sequence?

• Add the probabilities

• Multiply the probabilities

• Divide the probabilities

• Subtract the probabilities

What is the probability that out of five children, two will be normal and three will be Albina in any order?

• 45/1024

• 90/1024

• 243/1024

• 9/1024

How many different sequences are possible for two normal and three Albina children?

• 5

• 10

• 7

• 12

What is the probability that all five children will be phenotypically normal?

• 81/1024

• 324/1024

• 162/1024

• 243/1024

If the probability of one child being normal is 3/4, what is the probability for five children?

• 3/4

• 9/16

• 27/64

• 243/1024

What is the probability that at least one child will be Albina?

• 243/1024

• 781/1024

• 512/1024

• 1024/1024

How do you calculate the probability of at least one event occurring?

• Divide the probability of one event by the total

• Multiply the probabilities of all events

• Subtract the probability of none from 1

• Add the probabilities of all events

What is the only scenario where no child is Albina?

• Three children are Albina

• All children are normal

• One child is Albina

• Two children are Albina