What three processes can increase variation in a +e bors6dymhj y4)1z9jwh)q4population?

  Which of the following statement(s) are possible consequences to a polypeptidspg0 )y 4.obzde if a base substitution mutation occurs?b.pgo)s z4yd0
I. A shorter polypeptide chain is translated
II. An altered polypeptide chain is translated
III. There is no change to the polypeptide sequence

  The DNA sequence shown hop05yapl v;r 2as been taken from exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletion p;0l r25yvpao mutation in the sequence?

  What is a possible cause of a gu. z1uya.hn+ benetic mutation?

  In species that do not carry out sexual reproduction, what is a p(rmr y , o*aolt/o+k+nossible cause oly*(ko n ,o+/ rmoatr+f variation?

  Shown below is the single base substitution mutation that causes sgr6cg5nilrwh . nkcm02 -(gq1ickle cell anaemia in individuals who are homozygous for the allele. Which of the following is a resul 65k 2rcgrn-hgnqmg( l1cwi0.t of this mutation?

  Which statement about mutations in germ 5i kd8w):/f jvypn9pnand/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database 37 peme2p4h cgcomparing the cytochrome C gene sequence in two species. What does pge47epmc32 hit show?

  A population of plants wih wy* .dto)af6th no resistance to herbivores may develop into a population of plants that secrete a compound toxic to herbivores. How could this chant .odw6* )yahfge occur?

Different species of living organisms have different numbers p a (/too12mxn,xooq ioicb 6em3+f9)of genes characteristic to them. The table shows the estimated number of genes for five speci)(omx6n xomtocoop3 bia 1iqf9 2e+ /,es.
Species Estimated number of genes
Escherichia coli (bacteria species) 4,000
Drosophila melanogaster (fruit fly) 13,000
Canis lupis familiaris (dog) 20,000
Homo sapiens (humans) 30,000
Oryza sativa (rice) 40,000
1.Using the information in the table deduce the estimated number of loci in a human genome.

2.Explain how a mutation can affect a characteristic.

1.Outline the outcomes of t 4q39 kpsj.eji cqo72yhe Human Genome Project (HGP).

2.Variation sometimes refers to the differences between individuals of the same species. Describe the role of genes in variation.

3.The frequency of the sickle cell allele is higher in regions of the world where malaria is prevalent. Explain the cause of sickle cell anaemia and the correlation between the frequency of the sickle cell allele and the prevalence of malaria.

1.Describe how a mutation may be a sivlb4 3+,eta lllent mutation.

2.Outline five causes of gene mutations.

3.Compare and contrast the consequences of mutations in somatic and germ cells.