What three processes6n0 x5,ok vyh w+fb5g3iuk-m w can increase variation in a population?

  Which of the following statement(s) are possible consequencepb hrch g,b7 zqxtg31q).;41 bagqp+ls to a polypeptide if a base substitution mutqgp+.l) a grbcq3bz bq114xt ,p7ghh; ation occurs?
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 5latgdocbjww 32z7- 7 has been taken from exon 1 of DNA within the human insulin gene. Which sequence corresponds to a dzdc 5jla3-b o7wg2wt7 eletion mutation in the sequence?

  What is a possible cause of a ge0al6yl 3nomdv-u ayz0 y) 6sg+netic mutation?

  In species that do not carry out sexual reproduccgtxm5w:5n* *wc jlcr:y* n m9tion, what is a possible cause of va*c*c mr:mg t*j xy5w5nwnl:c9riation?

  Shown below is the single baspx:l vkcgp;92o5 1uw qe substitution mutation that causes sickle cell anaemia in individuals who are homozygous for the allele. w2kuc 5 g19ovxl p;q:pWhich of the following is a result of this mutation?

  Which statement about mutations in germ and/or somaticwws die/ yqw87 -uf+7r cells is correct?

  This table is a short b/o 9mz kw,jf lij o)50kld;/tsection of the output from a DNA sequence database comparing the cytochrome C gene sequence in two species/ o ;)9lwtmj dzkjlf 0/ib,5ok. What does it show?

  A population of plants with no resistance to herbivores may develscs8an-6ytmlz/* i i8q b48)wrw 8ld iop into a population of plants that s 6sy8sw n4ib/-a*dli8qm88 c)iwzltr ecrete a compound toxic to herbivores. How could this change occur?

Different species of living organism6req ()yces5i4 z6yjds have different numbers of genes characteristic to them. The taycjszq ee 4(5)dy66ir ble shows the estimated number of genes for five species.
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 the Human Genome Project . fotxjb 7p73;g +hrzc(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 silentv*ugj j8+4az a mutation.

2.Outline five causes of gene mutations.

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