Sex-linked Inheritance

• Science
• Middelbare school
• vwo
• Leerjaar 2

Sex-linked inheritance

Genes are located on:

1. autosomal chromosomes
2. All chromosomes
3. sex chromosomes
4. located elsewhere

What do you know about autosomal chromosomes?

What do you know about sex chromosomes?

What is the difference between a dominant and a recessive trait?

Dimpels are a dominant trait. If a father is homozygous recessive for dimpels (dd) and a mother is heterozygous for dimpels. What is the chance that their child will have dimpels (phenotype)?

1. 0% Dimpels
2. 25% Dimpels
3. 50% Dimpels
4. 75% Dimpels

Create a Punnett Square of RR (red flower) x rr (white flower). Assuming there is incomplete dominance, tell what percent of the offspring will be pink?

1. 0%
2. 25%
3. 50%
4. 100%

00:51

What is haemophelia? Summarize in your own words.

02:39

IF a sex-linked trait is recessive... and most are on the x-chromosome.. why is it advantageous to be female?

04:07

Is it possible for parents without haemophilia to have a child with haemophilia?

Yes

No

Maybe

Practice:

1. Go to studyguide

2. Click Science 2 Term 3 & 4

3. View planner

4. Read 5.6 

5. Complete workbook problems: 37, 38, 40, 42, 44

Next week: 

Homework completed 

Discuss 5.7 [Teacher instruction]

Independent work [Pedigree project]