3.1-3.6-DNA- Asexual and sexual reproduction+DNA Flashcards
Give two advantages of Asexual reproduction
.Only one parent is needed
.A rapid reproductive cycle
.Uses less energy
Give a disadvantage of Asexual reproduction
No variation in the population
Give two advantages of sexual reproduction
.Produces variation in Offspring
.Allows selective breeding
.Speeds up natural selection
Give a disadvantage of sexual reporduction
The requirement to find a mate
What gamete is Meiosis used to produce?
Haploid gametes
How does the cell end up with double the amount of genetic information?
.Makes copies of its chromosomes
After coupling its chromosomes how many cells does the cell divide into?
2
On the second time of division how many cells does it divide into?
4
Are gametes genetically different or similar?
Different
What does DNA stand for?
deoxyribonuleic acid
What are the small parts DNA is made up of known as?
Nucleotides
What do the two strands coiled together form?
A double helix
What are strands linked by?
Complimentary base pairs
What are the complimentary based pairs joined by?
Weak hydrogen bonds
What 3 things do Nucleotides consist of?
.A sugar
.A phosphate group
.One of the four different bases attached to the sugar
What is the genome?
The entire DNA of an organism
What is a gene?
A section of a DNA molecule that codes for a specific protein
Give the steps used to extract DNA from fruit
.Gently mix together water,salt and washing up liquid
.Heat the mixture
.Peel the skins of the fruit and chop into small pieces
.Add the solution to the fruit
.Filter the solution and pour it into a test tube
.Add pineapple juice to the filtrate
.Add 2 teaspoons of ethanol and wait ten minutes
