1. Genetics Ms Atkinson 2012

2. Genetics is the study of heredity

3. Inherited characteristics such as eye and hair colour are controlled by genes
Non-inherited characteristics, such as playing a guitar or riding a bike, must be learned

5. Inherited
Acquired

7. Inheritable characteristics are received from parents…
OB35 understand that humans have inheritable and non-inheritable characteristics
Inheritable characteristics are received from parents…
father mother

8. Check out some of your own inheritable characteristics…
OB35 understand that humans have inheritable and non-inheritable characteristics
Check out some of your own inheritable characteristics…
Arm fold preference
“Hitchhiker’s thumb”
Pinkie finger alignment
Ear lobe attachment

9. OB35 understand that humans have inheritable and non-inheritable characteristics
Check out your own…
Arm fold preference: fold your arms - ?Do you fold right-over-left or left-over-right?

10. ? Is it straight or curved?
OB35 understand that humans have inheritable and non-inheritable characteristics
Check out your own
“Hitchhiker’s thumb”: extend your thumb –
? Is it straight or curved?

11. ? Are they straight or curved away from each other?
OB35 understand that humans have inheritable and non-inheritable characteristics
Check out your own …
Pinkie fingers: place them side by side –
? Are they straight or curved away from each other?

12. ? Is it directly attached or separated ?
OB35 understand that humans have inheritable and non-inheritable characteristics
Check out own …
Ear lobes: look at your ear in a mirror –
? Is it directly attached or separated ?

13. Other inheritable characteristics include:
OB35 understand that humans have inheritable and non-inheritable characteristics
Other inheritable characteristics include:
eye
colour
freckles
blood type
haemophilia
cystic fibrosis
If you are connected to the internet, some of the images will link you to a source of information

14. Some non-inheritable characteristics: Athletic ability
OB35 understand that humans have inheritable and non-inheritable characteristics
Some non-inheritable characteristics:
Athletic ability
Artistic ability
Accent

15. two genes for eye colour
OB35 understand that inheritable characteristics are controlled by genes
For each inheritable characteristic, a human has two genes – one passed on by the father’s sperm cell, the other by the mother’s egg cell
two genes for eye colour
one gene for eye colour
one gene for eye colour

16. Genes are found on chromosomes
In a human there are 23 pairs of chromosomes (i.e. 46 chromosomes)
Chromosomes are located in the nucleus of a cell
Chromosomes are made of DNA and protein

17. 23 pairs of chromosomes, which are located in the nucleus
©news.bbc.co.uk

20. DNA stands for deoxyribonucleic acid

21. These chromosomes combine to make a zygote
Every zygote is a 1 in 64,000,000,000,000 combination of chromosomes

22. the code in DNA is different in every human being…(except for ?????)
Each individual’s unique code is called their DNA fingerprint
because of this, DNA is used in
crime scene investigation
parental disputes

23. the code in DNA is different in every human being…except for ?????
can you explain why

24. How are twins different?

26. Genetics and prediction!

27. Groups of Three
One recorder.
Two labradors.

28. YOU ARE NOW A LABRADOR
You are given two cards. On the cards are your GENOTYPE. Each card has one ALLELE (type of gene) on it. This particular allele is for COAT COLOUR.
If you are a Black Lab : G G or G g
If you are a Chocolate Lab: g g

30. Sometimes a compromise is reached in genetics or sometimes both are expressed!!

31. This is called co-dominance and incomplete dominance

32. Incomplete dominance– a intermediate trait is expressed (black and white = grey)

34. Co - dominance Both traits are expressed!

37. [2007]
Where is DNA located in cells?
Name a second substance associated with DNA.

38. [2008]
At certain stages in the life of a cell thread-like structures that contain genes can be seen in the nucleus.
What are these thread-like structures called?
Genes are located on these thread-like structures. Give a role that genes play in life processes.

39. [2006]
Eye colour, hair texture and many other human characteristics are controlled by genes.
Name the structures in the nuclei of our cells where genes are located.
Name the substance that genes are made of.