OCR 21st Century Biology

Includes: Genes, chromosomes, DNA, Inheritance, genetic disorders and genetic testing.

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  • Created by: Joe Gee
  • Created on: 13-05-10 19:26
What do you call different versions of the same gene?
Alleles
1 of 8
How do you represent alleles in genetic diagrams?
Letters
2 of 8
What do all women have as their sex chromosome?
**
3 of 8
What is the percentage of having a couple having a boy?
25%
4 of 8
How many recessive alleles do you need for cystic fibrosis?
2
5 of 8
What part of a cell does cystic fibrosis effect?
Membrane
6 of 8
Testing embryos for genetic disorders is known as pre-implantation genetic diagnosis?
True
7 of 8
Where can you find the genetic material in your body cells?
Nucleus
8 of 8

Other cards in this set

Card 2

Front

How do you represent alleles in genetic diagrams?

Back

Letters

Card 3

Front

What do all women have as their sex chromosome?

Back

Preview of the front of card 3

Card 4

Front

What is the percentage of having a couple having a boy?

Back

Preview of the front of card 4

Card 5

Front

How many recessive alleles do you need for cystic fibrosis?

Back

Preview of the front of card 5
View more cards

Comments

Vicky

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A good quiz however according to my revision guide the answer to question 6 is 50%

luv2help

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The answer to question 6 is 50% not 25%

fantasy

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It says i got question 6 wrong but im pretty sure I never... if chances were 25% that would mean 75% of the population are female which is incorrect

Cara Evans-Gillen

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As the others have commented, it's 50% chance of having a boy, please fix this

Ann Grant

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The answer to question 6 is 50%:

 Mother has **. Father has XY.

Mother X(1)+ Father X = ** = girl

Mother X(2) + Father X = ** = girl

Mother X(1)+ Father Y = XY = boy

Mother X(2) + Father Y = XY = boy

2XYs = 2 boys. 2 YYs = 2 girls 

2/4 boys = 1/2 = 50% chance of boy.

Hope this clears it up for anyone who's confused. Try drawing a Punnett square if still confused.

Mel G

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Vicky wrote:

A good quiz however according to my revision guide the answer to question 6 is 50%

 I agree.

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