B4 - Genes, reproduction and evolution Flashcards
1
Q
Alleles
A
Different versions of the same gene
2
Q
Mitosis
A
When a cell reproduces by splitting to for two genetical identical offspring
3
Q
Haploid
A
Only one copy of each chromosome
4
Q
Which chromosomes decide sex
A
23rd
5
Q
Which chromosome cause male characteristics?
A
Y
6
Q
Homozygous
A
Two alleles for a gene which are the same
7
Q
Heterozygous
A
Two alleles for a gene which are different
8
Q
What is polydactyly
A
condition where you are born with extra fingers or toes
dominant
9
Q
How does genetic engineering work?
A
Select desirable gene remove it with restriction enzymes cut open plasmid gene inserted into plasmid ligase joins strands together introduced to normal DNA PLANT IS A TRANSGENIC ORGANISM
10
Q
What is the plasmid?
A
A vector
11
Q
Two types of gene therapy
A
changing genes in body cells
changing genes in gametes
