What three processes can increase variation ede-3 ; dc-gfl3 5n w(ss3gjzn3ljlu:in a population?

  Which of the following statement(s) are possible conseqlwjajiriu )-)knxy 2 -*mvv./uences to a polypeptide if a base substitution mutation occulvi2jn)uv.w* yrk-a/x )j im-rs?
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 has been taken from exon 1 of DNA within the human i)st5qvoxb e+)vmlw +3nsulin gene. Which sequence corresponds to a del q+)s tmb)lo xv5v3+ewetion mutation in the sequence?

  What is a possible cause of ad,3 ky/mr.geg genetic mutation?

  In species that do not carry out sexual reproducti*dfi 6(hw -)jr+qu u fxvo8rcz.he5w: on, what is a possible cause ofu -f 6ijh8qv(r).xuhwo *fewz r+d:5 c variation?

  Shown below is the single base substitutionpc,hzqx;l*/4 :y pbqa mutation that causes sickle cell anaemia in individuals who pq zqclp*h;y xa4:,/bare homozygous for the allele. Which of the following is a result of this mutation?

  Which statement about mutations in geppt3rg*5x m o 7ify.l .qnu+e3rm and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database comp5iax; j 2dzyzu*+m bd ,y9:kauaring the cytochrome C gene sequence in two specieud +:zji5kad * m;uzxy92 by,as. What does it show?

  A population of plants with no resistance to herbivores may developlyibj pw29g3z86dn *fbg+y 0y into a population of plants that secrete a compound toxil0 wgjpdy8b *y+g36 nzfiyb92c to herbivores. How could this change occur?

Different species of living organisms have different numbers of genes characterrv1// bs0dcc 5g(tqd(ok- pikistic to them. The table shows the estimated number ofb- c c(1tig/rdq /v0ksokpd5( 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 (HGP0; ir4jltu+cjac+ jn-u)bj . e).

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 m) nyvt5hwg2i 2 mk *,(qj 9pd)pmyj1fyay be a silent mutation.

2.Outline five causes of gene mutations.

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