B6- Inheritance, Variation And Evolution

Question 1

double helix

Answer 1

two strands of DNA coiled up together

Question 2

what do genes code for

Answer 2

a particular sequence of amnio acids

Question 3

name for all of the genetic material in an organism

Answer 3

genome

Question 4

name the male and female gametes of animals

Answer 4

female- egg
male- sperm

Question 5

type of cell division to make gametes in humans

Answer 5

meiosis

Question 6

probability that offspring will have the XX combination of sex chromosomes

Answer 6

50%

Question 7

alleles

Answer 7

determine your characteristics

Question 8

what genotype is heterozygous

Answer 8

having two different versions of the same gene

Question 9

name an inherited disorder

Answer 9

cystic fibrosis

Question 10

argument for screening embryos

Answer 10

help stop people suffering, treating disorders is expensive

Question 11

argument against screening embryos

Answer 11

screening is expensive, suggests people with genetic problems are not wanted, people might start to use it to pick how they want their baby to look

Question 12

variation

Answer 12

differences between individuals of the same species

Question 13

process by which evolution happens

Answer 13

natural selection

Question 14

selective breeding

Answer 14

when humans choose which plants or animals they are going to breed

Question 15

genetic engineering

Answer 15

a process that uses laboratory-based technologies to alter the DNA makeup of an organism

Question 16

one way fossils can be formed

Answer 16

gradual replacement by minerals, casts and impressions, preservation in places where no decay happens

Question 17

what is the smallest group in the Linnaean system of classification

Answer 17

species

Question 18

who proposed the three-domain system of classification

Answer 18

carl woese