What three processes can increij di7v bv1w 4 kj;x*ga-dnd8jrj32*h ase variation in a population?

  Which of the following statement(s) are8;jla5 q ,cvc eqfg; 9 vn7rx*v1wft7d possible consequences to a polypeptide if a base substitution v*97,xcj;aqnfc d ;q1 v8e tf 7g5wvrlmutation 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 tu ,e4jh4axf(lhe human insulin gene. Which sequence corresponds to a deletionlhxj(,44 eu af mutation in the sequence?

  What is a possible cause of a gl/lt f4c3bglf/7wn3g enetic mutation?

  In species that do not caj)8posbk) syo (v o7v)rry out sexual reproduction, what is a possible cause of varia jvkbv)(oo)sy o8p7 s)tion?

  Shown below is the single base substitution mutation that causes si9n xtvxe 36qz.l;6js8+rhgs6cf b : yfckle cell anaemia in individuals wh+bvyq:69fc8sf6xj gxlznr 63; s .h teo are homozygous for the allele. Which of the following is a result of this mutation?

  Which statement about mutations in ges:4qe(o ;m rvnrm and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequen 3y)em.f ox5w ty7u1vuce database comparing the cytochrome C gene sequence in two species. What does it showe3y.1w7t mxu5u )vfoy?

  A population of plants with no resistance to herbivorej skg 00fdq4ycn 3lp19s may develop into a population of plants that secrete a compound toxic to herbivores. How could this change occurng1 fldp0 3kqcjy94s0?

Different species of living organisms have different numbers of n5c1e-s4yjls 6ubq6d genes characteristic to them. The table shows the estimated6bs qd6nl -c5e1sju y4 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 Genoh y o;8b0k*4m* axiivtme 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 silb4 2 gjrl29otlent mutation.

2.Outline five causes of gene mutations.

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