# Inherited disorders (Part 2)

In this lesson we will learn how family trees can be used to explain patterns of inheritance. We will then learn about embryo screening, and practice exam skills such as evaluating and comparing.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.Inherited disorders are passed from...

1/6

Q2.Inherited disorders are caused by...

2/6

Q3.Tick the 3 statements which apply to polydactyly

Select three (3) boxes

3/6

Q4.Tick the 4 statements which apply to cystic fibrosis

Select four (4) boxes

4/6

Q5.What is the probability the offspring will have polydactyly? (You may have to draw out and complete the Punnett square to help you.)

5/6

Q6.What is the probability of offspring inheriting cystic fibrosis if both parents have heterozygous alleles? It is a good idea to draw a Punnett square to help you answer this.

6/6

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.Inherited disorders are passed from...

1/6

Q2.Inherited disorders are caused by...

2/6

Q3.Tick the 3 statements which apply to polydactyly

Select three (3) boxes

3/6

Q4.Tick the 4 statements which apply to cystic fibrosis

Select four (4) boxes

4/6

Q5.What is the probability the offspring will have polydactyly? (You may have to draw out and complete the Punnett square to help you.)

5/6

Q6.What is the probability of offspring inheriting cystic fibrosis if both parents have heterozygous alleles? It is a good idea to draw a Punnett square to help you answer this.

6/6

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the â€˜Resume Videoâ€™ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click â€˜Nextâ€™ below.

Quiz:

# Inherited Disorders Part 2

This quiz will assess you on knowledge learned in today's lesson, as well as what you have learned in earlier lessons.

Q1.Which of the following is a disorder caused by a recessive allele?

1/6

Q2.Which of the following is a disorder caused by a dominant allele?

2/6

Q3.Couples who carry alleles for a disorder but want to have a baby may choose to undergo...

3/6

Q4.The diagram shows inheritance of Tay-Sachs disease. Identify a female with the disease.

4/6

Q5.How does this diagram show that Tay-Sachs disease is caused by a recessive allele?

5/6

Q6.A couple both carry an allele for cystic fibrosis. They are concerned about the impact of having a child with the disorder would have on their current children. What type of consideration is this?

6/6

Quiz:

# Inherited Disorders Part 2

This quiz will assess you on knowledge learned in today's lesson, as well as what you have learned in earlier lessons.

Q1.Which of the following is a disorder caused by a recessive allele?

1/6

Q2.Which of the following is a disorder caused by a dominant allele?

2/6

Q3.Couples who carry alleles for a disorder but want to have a baby may choose to undergo...

3/6

Q4.The diagram shows inheritance of Tay-Sachs disease. Identify a female with the disease.

4/6

Q5.How does this diagram show that Tay-Sachs disease is caused by a recessive allele?

5/6

Q6.A couple both carry an allele for cystic fibrosis. They are concerned about the impact of having a child with the disorder would have on their current children. What type of consideration is this?

6/6

# Lesson summary: Inherited disorders (Part 2)

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance