B6 Inheritance Variation and Evolution

Question 1

DIfferences between Sexual and Asexual reproduction

Answer 1

1. Sexual two parents, Asexual one parent
2. Sexual Genetically different offspring, Asexual Genetically Identical offspring

Question 2

3 Advantages of Asexual Reproduction

Answer 2

1. Faster Reproduction, offspring produced quickly
2. Energy efficient, less energy is being used up
   3 Only one parent, no need to find a mate

Question 3

3 disadvantages of Asexual reproduction

Answer 3

1. No genetic variation, offsprings are all clones
2. vulnerable to diseases, one disease can wipe all
3. less adaptable, cannot easily change in environments

Question 4

3 advantages of sexual reproduction

Answer 4

1. Genetic variation, increases survival chances
2. Greater adaptability, populations can evolve through natural selection
3. Increased disease resistance, variation reduces impact on disease to the entire population

Question 5

3 disadvantages of asexual reproduction

Answer 5

1. slower process, fewer offspring
2. requires two parents, more energy and time is taken
3. more energy is used, for mating and the development of the offspring

Question 6

4 stages of Meiosis

Answer 6

1. cell duplicates DNA
2. chromosomes line up
3. chromosomes are pull apart
4. four genetically different gametes

Question 7

What is a Genome

Answer 7

complete set of DNA in an organism

Question 8

What is the structure of DNA

Answer 8

• double helix
• made up of multiple nucleotides

Question 9

What are nucleotides made up of

Answer 9

a pair of bases, sugar and phosphate

Question 10

What are alleles

Answer 10

two versions of the same gene from each parent

Question 11

What are Genotypes

Answer 11

Genetic makeup that codes for attribute

Question 12

What are Phenotypes

Answer 12

Physical features and attributes

Question 13

What are Variation

Answer 13

the difference between two species

Question 14

What is Darwin’s theory of evolution

Answer 14

Natural selection