What three processes can v5 tkxt,+hr;5pt h+tpincrease variation in a population?

  Which of the following stz vs8i(b8q.on atement(s) are possible consequences to a polypeptide if a base substitution mq zi(nb8v. os8utation 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 beene +u uf1i+2w1qe)n mwc taken from exon 1 of DNA within the human insulin gene. Which sequence corresponds to a ui+wm q1)+fcnwu12e e deletion mutation in the sequence?

  What is a possible cause of a genetic my43f ti* /wd-pa ez*ycutation?

  In species that do not carry out sexual reproduction, whatbj(odvt9e eq3rwd8c n8 fkh +9,z-fo 6 is a possible cause of vafo fkz8trno-h,69+je dqewv d83c 9 (briation?

  Shown below is the single base substitution mutation that causes sickle celrw;2+fe/;-jh g hl call anaemia in individuals who are homlcg2ef;j h +-warl;h/ozygous for the allele. Which of the following is a result of this mutation?

  Which statement about muw khk ki(s71g,tations in germ and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence datpb9wk qz/b ;r6abase comparing the cytochrome C gene sequence in two species. What; wbb 9rqpz6k/ does it show?

  A population of plants with no resistance to herbiv7koc +a yl3g.lores may develop into a population of plants that secrete a compound toxic to her lkgy co3.la+7bivores. How could this change occur?

Different species of living organisms have different numbers of rn2 bj*afs*1obx wh-9genes characteristic to them. The 2obx1bh a*n 9-fwjr*s 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:ooo9tg8s q 2o me)i 5hi, -tn,ubex7g 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 mutoi2vzusl-j+ d 9 q *15rbxioo t*fc8(isev+ o:ation 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.