Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
19 Cards in this Set
- Front
- Back
|
Where is DNA found within a cell? |
In the nucleus
|
|
|
True or false - chromosomes are usually found in groups of 4?
|
False - they are found in pairs |
|
|
What is a gene?
|
A short length of a chromosome which controls a characteristic e.g hair colour |
|
|
What are alleles?
|
Different versions of the same gene
|
|
|
How many chromosomes are found in a standard human cell?
|
23 pairs
|
|
|
How many chromosomes are found in a sperm or egg cell?
|
23 single
|
|
|
What are the male sex chromosomes?
|
XY
|
|
|
What are the female sex chromosomes?
|
XX
|
|
|
What does homozygous mean?
|
You have two alleles the same for a certain gene.
|
|
|
What does heterozygous mean?
|
You have two alleles that are different for a certain gene.
|
|
|
If you inherited the gene for blue eyes from your mum and brown eyes from your dad, which are you likely to have and why?
|
You are more likely to have brown eyes as the brown eye gene is dominant and the blue eye gene is recessive
|
|
|
Apart from you genes what else affects the way you are?
|
The environment (diet, upbringing etc)
|
|
|
What is a clone?
|
Genetically identical organisms
|
|
|
Is the gene for cystic fibrosis dominant or recessive?
|
recessive
|
|
|
Is the gene for Huntingtons disorder dominant or recessive?
|
dominant
|
|
|
What are the symptoms of Huntintons disorder?
|
Shaking, erratic body movements and mental deterioration
|
|
|
What are stem cells?
|
Stem cells are cells that can change their role to beome any type of cell
|
|
|
Why are stem cells useful?
|
They could be used to cure many diseases and injuries
|
|
|
Why are people against using stem cells?
|
They are taken from embryos and some people feel that it is not right to terminate the life of an unborn child
|
