What three processes can increase variation in a pou 2si 4mxq:/qlpulation?

  Which of the following statement(s) are possible consequences to a polypeptide i bmf;d0o6sxh.h 4whq4f a base substow4bh.xm4hh0s d q;6fitution 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 x r6ra43r u(pez4b(xu exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletion mutation in the sequen (rr4 ue3( urzpbx6xa4ce?

  What is a possible cause of acvnvh,u xvr7mdt .n6.l 9mj 0* genetic mutation?

  In species that do not carry out sexual reproduction, what is 4hwg xr:zu2r. a possible cause of varz h.wg4x: 2rruiation?

  Shown below is the single base substitution mutation that causes sickle cell 0 xk.f e;1nasbanaemia in individuals who are homozygous for the allele. Which of the following is bs;kaxnf01e. a result of this mutation?

  Which statement about mutations in germgt*8/q0 3ntp vqza,viw,6vu o and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence database comparime mbfu:14/3pg c 59fnnw/ actng the cytochrome C gene sequencw/a94bf: p/1ufnmng ecc m5 t3e in two species. What does it show?

  A population of plants with no resistance to herbivores may deven opp/0hp*mn 2 dm-g(tlop into a populah td 2*-/n pmpgpon(m0tion of plants that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organisms have different numbers of genes characxc+g, cqo- w(s+k4 et bdhd(n7teristic to them. The table shows the estimated (b og(xdcc7+4ekhw tnsq d+-,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 7wtdjwkt mp a//gs03 ;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 k6 uuah.9jt .ng.cee0a silent mutation.

2.Outline five causes of gene mutations.

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