genetics Flashcards
How many chromosome pairs are there?
23
How many autosome pairs are there?
22
How any sex chromosomes are there?
1
How many copies from each pair is inherited from each parent?
1 copy from each pair
What is the shape of DNA?
Tightly rolled double helix
DNA is the backbone of…
Sugar and phosphate
What are the 4 bases of DNA?
Adenine
Thymine
Cytosine
Guanine
What pair is Adenine always with?
Thymine
What pair is cytosine always with?
Guanine
What pair is T always with?
A
What pair is G always with?
C
DNA duplicates during…
Cell division (mitosis) into a diploid number or chromosomes
What is meiosis?
The division of gametes (sex cells) which are termed as haploid
What are 3 roles of DNA?
Storing information
Passing on of information to the next generation
Allows for changes when required
Genes are made up of sections of..
DNA
What is the area on a chromosome called where the gene is located?
Locus
What is the alternative form of the same gene called?
Allele