Biology B1 - You and Your Genes - OCR 21st Century

These questions are taken out of the exam board's revision guide, meaning that they're all things you need to know.

?
Where are chromosomes found within a cell?
Nucleus
1 of 19
In humans, chromosomes are usually found in groups of 4.
False - They're found in groups of 2
2 of 19
What are alleles?
Different versions of the same gene
3 of 19
What is meant by 'genotype'?
A description of the genes an organism has
4 of 19
What is meant by 'phenotype'?
A description of the physical characteristics an organism has
5 of 19
What is weight determined by?
Genes and environmental factors
6 of 19
The egg and sperm cells are...
Gametes
7 of 19
How many chromosomes are found in gametes (sex cells)?
23
8 of 19
What is meant by 'homozygous'?
2 of the same alleles for a particular gene.
9 of 19
What sex chromosomes do human males have?
XY
10 of 19
If you have 1 dominant and 1 recessive allele, which characteristic is shown?
The dominant characteristic
11 of 19
Is the allele for Cystic Fibrosis dominant or recessive?
Recessive
12 of 19
During IVF treatment, what is the process of testing embryos to see if they have a genetic disorder called?
Pre-implantation genetic diagnosis
13 of 19
What is one other use of genetic testing?
To see how a drug will affect a certain individual
14 of 19
What is meant by a 'false positive' result?
When a healthy person is told they have a genetic disorder
15 of 19
What is an issue surrounding genetic testing?
Insurance companies could refuse to give life insurance to people with alleles for a genetic disease
16 of 19
What is meant by the term 'clone'?
Genetically identical organisms
17 of 19
What are stem cells?
Unspecialised cells
18 of 19
What is one way that stem cells can be used to treat an illness?
Bone marrow transplant
19 of 19

Other cards in this set

Card 2

Front

In humans, chromosomes are usually found in groups of 4.

Back

False - They're found in groups of 2

Card 3

Front

What are alleles?

Back

Preview of the front of card 3

Card 4

Front

What is meant by 'genotype'?

Back

Preview of the front of card 4

Card 5

Front

What is meant by 'phenotype'?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all DNA and inheritance resources »