Feb Mocks - Paper 2 Key Definitions

Question 1

Operon

Answer 1

A group of genes under the control of the same regulatory gene

Question 2

Intron

Answer 2

Non coding section of a gene

Question 3

Structural gene

Answer 3

Code for proteins not oct do with dna regulation

Question 4

Regulatory gene

Answer 4

Code for proteins to do with dna regulation

Question 5

Operator

Answer 5

Where represor proteins bind in lac operon

Question 6

Promoter

Answer 6

Where rna polymerase binds in the lac operon

Question 7

What are the operator and promoter

Answer 7

Dna sequences

Question 8

Apoptosis

Answer 8

Removal of unwanted cells and tissues to shape body parta - control led by hox genes

Question 9

Genotype

Answer 9

The genetic make up of An organism

Question 10

Phenotype

Answer 10

Characteristics displayed by an organism

Question 11

Co dominance

Answer 11

2 alleles are equally dominant heterozygous phenotype will be intermediate

Question 12

Múltiple alleles

Answer 12

More than 2 alleles possible for a phenotype

Question 13

Sex linkage

Answer 13

Characteristics determined by alleles on sex chromosome

Question 14

Autosomal linkage

Answer 14

Genes on same chromosome inherited together decrease phenotypic ratios

Question 15

Epistasis

Answer 15

Interactions of genes at different loci , an allele can mask or modify the phenotype of another allele

Question 16

Speciation

Answer 16

Forming a new species by evolution

Question 17

Allopatric speciation

Answer 17

Separation, founder, effect, differences between populations

Question 18

Sympatric speciation

Answer 18

Same habitat species interbreed

Question 19

Body plan

Answer 19

The observable spatial arrangement of an organisms body parts

Question 20

Morphogenesis

Answer 20

The regulation of patterns of anatomical development