What three processes can increase variation in a px*rfx, wtbfi51 26 re*nap7swopulation?

  Which of the following statement(jbe4jvb ;l2 ;is) are possible consequences to a polypeptide if a base subs 4bv;;2e bijjltitution 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 has been taken from exon 1 of 3a643:bb-dx hc no 71wleufl/bd u p7dDNA within the human insulin gene. Which sequence corresponds to a deletion mutation in cax-lb/bd63 7wfp d 1ulenoh3ub:4 7dthe sequence?

  What is a possible cause of aw b1ep6l0jd 4u genetic mutation?

  In species that do not carry out sexual reproduction, what is dxf7nyv-n.j8a possible cause of 7 jvn y.ndf8x-variation?

  Shown below is the single b2jq3zo jy*r- a fvb;pdy8 yzv32j6a)u ase substitution mutation that causes sickle cell anaemia in individuals who are horaf avj3py2*36zy zqbv- )j2yjd u8o; mozygous for the allele. Which of the following is a result of this mutation?

  Which statement about mutations in germ and/or somatic cells is+/ mx z);8v7yyckflztfw i /-b correct?

  This table is a short section of the output from a DNA sequence database compal0y8 6z6y -juauvu d7oring the cytochrome C dyv6ojluz086u7-yaugene sequence in two species. What does it show?

  A population of plants with no resistance to herbivores ma pbn7bsy 0z.n gr2fz./y develop into a populati7zsp2 fg.yz.br /n0nbon of plants that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organisms have different numbers of genes lcmon91/. 4tu i t;ygl 4.iu(u7czeqqcharacteristic to them. The table shows tn..9 ;l (oyl4ii q1qe g4 ucuzutm7ct/he 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 ohnm;0p+h5 zr.j zgbt:d h.7wjf the 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 silent mutag .dp( tc.xy.o19tmha i ;c1fjtion.

2.Outline five causes of gene mutations.

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