What three processes can increase variati 8:n o+)ovok +hgnb.fhon in a population?

  Which of the following statemj-sk c7rki)z :ent(s) are possible consequences to a polypeptide if a basecs:)ij-kk zr7 substitution mutation 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 ha49a0btlw -yh2 xy7z9o (rxfiek: x3ma s been taken from exon 1 of DNA within the human insulin gene. k t0-x4bam a9 :(r93lfxwozh7ey2ix yWhich sequence corresponds to a deletion mutation in the sequence?

  What is a possible cause of a genetic mutati)olmu0l5j/3bld .g/z znv qc; on?

  In species that do njeu kgq w/g9x it2s68*n .d5arot carry out sexual reproduction, what is a possible cause of variation9 gu2dgi r k6 enxws58/.jqta*?

  Shown below is the single base substitution mutation that causes sickcn lc8i6cy,5 +ko d)br;iw vo3le cell anaemia in individuals who are homozygous fdici,rn+l o5 y6 kw;vbo8)c 3cor the allele. Which of the following is a result of this mutation?

  Which statement abou, w dcwr3y:k6 27qfobit mutations in germ and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database j4g.tw0 bo2s .*rmklbac wb*f26n7n a comparing the cytochrome C gen2o a 0 kwbgjcw24n am*l*s.7rb6b.ntfe sequence in two species. What does it show?

  A population of plants with no resistance tnd:7 19hjy bluq; u(7p -zkgoho herbivores may develop into a population d19gzku- jl:onq7 ;p7ubh(hy of plants that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organismsmxqkj x*870lrrq s95d have different numbers of genes characteristic to them. The table shows the estimated numb7r8q sxmj5xrd l9qk0*er 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 Pxq.zv5 t+. fpnroject (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 mutationm:slh*0t r fi gzz6iv*u99ttjw, 7u6 p may be a silent mutation.

2.Outline five causes of gene mutations.

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