What three processes cvx cqar +cf8,2a+9q cx6dt6xp;xqhe0 an increase variation in a population?

  Which of the following statement(s) are possibl)gjokcw1. q 5wbg3r( z ey.;b) evon0re consequences to a polypeptide if a base substit ywq.g;b zvbooc0 ne)3w rj5k.eg)(1r ution 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 DNA within the h-0f ln2ycl i. 3agkc:human insulin gene. k 3fil2l-0ahc .:ncgy Which sequence corresponds to a deletion mutation in the sequence?

  What is a possible cause of a gej qfw;5gt.wp w-/x.*v -hheklj() tdpnetic mutation?

  In species that do n;i)99ufx5 vopa6x j. chjd;ngot carry out sexual reproduction, what is a possible cause oj;;5joipag6hvdc)9x x nu9. ff variation?

  Shown below is the single base substitution mutation that causes sickle v;f- t*s0e qkvcell anaemia in individuals who are homozyg-kef;tv0s v *qous for the allele. Which of the following is a result of this mutation?

  Which statement abou/ 5svt ) tjosrq(bl,6m;7i gpit mutations in germ and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database cojp ; +d,rpo7hfmparing the cytochrome C gene sequence in two species. What doesoh;7 r,fpd+j p it show?

  A population of plants with no resistance to herbivores ma.uef8wc) e3ss6q0 mkqt*p ;txy develop into a population of plants that secrete a compound toxe sfe8 6tucqm;)s*xpq0k3 w.t ic to herbivores. How could this change occur?

Different species of living organisms have different numbers of 0vqxo(04f xmn1r d8 gfgenes characteristic to the4dx8o0 r(x0nm1f fqvgm. The table 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 thh-2ynmbp /wxig0l*5 ad.n -xmi1ud31bqu lh ;e 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 mutationate98+ k f1np1n2 udfm 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.