B2.7 Cell Divison And Inheritance

Question 1

What’s meiosis?

Answer 1

Involved in making gametes for sexual reproduction

Replicates , split, split again

Question 2

What’s a stem cell?

Answer 2

A cell that can grow into different body cells

From bone marrow or embyos

Question 3

What’s differentiation?

Answer 3

When a cell specialises

Question 4

What are totipotent cells?

Answer 4

Can go into any cell

Question 5

What are pluripotent cells?

Answer 5

Can be almost any human cell

Question 6

What are multipotent cells?

Answer 6

Can become more than one cell

Question 7

Uses of stem cells?

Answer 7

Burn victims
Heart attacks
Parkinson’s disease
Paralysis

Question 8

Ethical issues with stem cells?

Answer 8

Destruction on embyos 
Need drugs
Hard to get cells
Some can form tumours
Can differentiate to the wrong thing

Question 9

How many chromosomes do humans have?

Answer 9

23 pairs

Question 10

What’s an allele?

Answer 10

A version of a particular gene

Question 11

What’s a chromosome?

Answer 11

Large molecule of DNA

Question 12

What’s a gene?

Answer 12

A small section of DNA used to code proteins

Question 13

What’s different between genes?

Answer 13

Each gene codes for a particular combination of amino acids to make specific proteins

Question 14

What’s homozygous?

Answer 14

2 of the same allies

Question 15

What’s heterozygous?

Answer 15

2 different alleles

Question 16

What’s DNA?

Answer 16

Base pairs with a sugar back bone

Question 17

Who’s Mendel?

Answer 17

Peas
Characteristics came from parents
Ignored as he was a monk

Question 18

What’s ploydactyly?

Answer 18

Extra fingers

Dominant allele

Question 19

What’s genetic testing?

Answer 19

Analysis of DNA to see if they are a carrier

Question 20

What’s embyos transplants?

Answer 20

Pre implantation genetic diagnose
Used with IVF
Pick a healthy embyo
Expensive, ethical, side effects, hard

Question 21

What prenatal testing?

Answer 21

A small sample of amniotic fluid is taken and tested but there’s a chance of miscarriage and ethical issues with abortion

Question 22

What’s mitosis?

Answer 22

Sexual cell division 
2 identical cells formed 
For new body cells repair or asexual reproduction 
Copy's itself 
Then divides