What three processes can increase v0imgd(hs8pb 4 ariation in a population?

  Which of the following statement(s) are possible consequences to a polypeptide ihu dhgk )ly, ;1lpb :f2h(rw7kf a ;7)hhkf,2wl 1 bg rup:(h ylkdbase 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 ha56 rdjxx-xz( xs been taken from exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletdxxjr 5x6 x(-zion mutation in the sequence?

  What is a possible cause of a genetic mc/,iylx, .yuve 5mqrz1b+ (edutation?

  In species that do not carry out sexua 7p+4yf gkyu-s1 jm0lal reproduction, what is a possible cause of varik jm+fa7ugs1p4 yyl- 0ation?

  Shown below is the single base s *6+qllnl uhz(spgi3,ubstitution mutation that causes sickle cell anaemia in individuals who are homozygous for the allele. Which of the following is a result of this mutatioplhuiz l(q36sl n,+*gn?

  Which statement abouik)sm81y,zw/ax. feasth. l5 t mutations in germ and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequenck7e j( wewwuy,dq ,;omr8u2/m e database comparing the cytochrome C gene s7/(wu,wemmeuo,r2 dy kw8jq;equence in two species. What does it show?

  A population of plants with nox89lmno qrk oiqb011p+5j ) f*qfwd +m resistance to herbivores may develop into a population of plants that secrete a compound toxic to herbivores. How co5q)lf+1 *q qf8xr 0w+9mopko 1m dijbnuld this change occur?

Different species of living organisms have differen2mjuc p 4m* u++)otkddt numbers of genes characteris tp)mk d+u42cjm+ou* dtic to them. 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 the Human Genome Pro7tc-3 xx2sshl ijt,(gject (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 mutagv7)kkr- j)hx1r0 z p75zjsj etion 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.