Genetics and Inheritance Flashcards
(8 cards)
1
Q
What is gene
A
A piece of DNA that controls one trait
2
Q
What is allele
A
Different forms of a gene
3
Q
What is genotype
A
The alleles a person has
4
Q
What is phenotype
A
The physical trait shown
5
Q
What are 2 genetic diseases
A
Haemophilia
Sickle cell anemia
6
Q
What is the causes of genetic variation
A
Crossing over in meiosis
Independent assortment (random mixing of chromosomes)
Fertilisation (random sperm + random egg)
Mutations (random changes in DNA)
7
Q
What are the benefits of cloning
A
Preserve rare species
Medical use
Agriculture
8
Q
What are the problems/disadvantages with cloning
A
Low success rate
No variation
Ethical issues
Shorter lifespan
