What three processes can increase variurst . 8jcj(g3ation in a population?

  Which of the following statement(s) are possible cz7fgw 8x27d89z w djx-bimqvi0vu+ q-onsequences to a polypeptide if a base substit-qdqf vz 7w2x0 igdz8i9u +7b8xjwv m-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 tak9 kh7g/k7 i vj8t8hmcgen from exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletiovk78/9cih j g8ktmgh7n mutation in the sequence?

  What is a possible cause of a genetic mut) sbe t)26piyp+t6ezt ation?

  In species that do not carry oucd7pwb7p7h 7c 3kbw;irod 33qt sexual reproduction, what is a possible cause of variawiq p7;dkcc3h7rw7bbo p7 3 3dtion?

  Shown below is the single base suzg 10x(0*6 g-gk cn v/rgwzoqlad2 ++9xosrwy bstitution mutation that causes sickle cell anaemia in individuals who are homozygous for the allezw+kcglrq 6(s2oad 9g y o0x01gngx+-z* rv/wle. Which of the following is a result of this mutation?

  Which statement about mutations in germ an+4 ch7hqcme +ed/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database 31 2t ((sm d2rfj9xr3rjkwlq gt/vng2x:j(mo comparing the cytochrome C gene sequence in two species. What does it show? j xojr3 gmfjtd2n mg(k3:(v1l9rq( x rw22 st/

  A population of plants with no resistance to herbivores uh4+mp s3wz5emay develop into a population of pla3+5esup 4mz hwnts that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organisms have different numbers of genes znu4uw)c jupaw4 zlbd/l1 ;my y;1+j. characteristic to them. The table yjwduw+ )ly .una1/u bzc4jp z;;41mlshows 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 Project (HGP)zzrws4iwex u+05 gz+..

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 sim02/2 xi h1 nwwho5xyulent mutation.

2.Outline five causes of gene mutations.

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