What three processes can increase van7cmw q- 89kpakp9c 7vriation in a population?

  Which of the following statem640wahbfr/q z0a0ja 9b: phhlent(s) are possible consequences to a polypeptide if a base substitution mutwa/6rlf:ph4 0b 9 j0qbh0haz aation 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 fromz8 jgkvj8 t )ih.sd*7t+t kbdg1* up7t exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletion mutation in the sequ*h btdgjt.tuv)*jzd8t+ 1s7i8p7 g kkence?

  What is a possible cause of a genetiz8o po oh9+cw0sxwwdx(8 n+s r ,8vi+wc mutation?

  In species that do n9z+9f kj9tud0gw e.n(si:i ybe (:gmcot carry out sexual reproduction, what is a possible cause of vard e 9gctks(:im ubfnz9:0.ji(+ e9 ygwiation?

  Shown below is the single base substitution mutationh*s27 6qn uibz that causes sickle cell anaemia in individuals who are6bun 27hsqi z* homozygous for the allele. Which of the following is a result of this mutation?

  Which statement abou ujs-gg yc0+7ut mutations in germ and/or somatic cells is correct?

  This table is a short section of the outpgtjedd dt qp592p7z381 yln )kut from a DNA sequence database comparing the cytochrome C gene sequence in two specieynpp3jdglkt7 5)e q92t d1 d8zs. What does it show?

  A population of plants with no resistance to herbivojn:k jx1-gr3 y5rdul -res may develop into a population of plants that secrete a compound toxic td:g-j j5rk3-rxun 1 lyo herbivores. How could this change occur?

Different species of living organisms have differenl* x xr rlw*rdbi6;v*3t numbers of genes characteristic to them. *vlx x6;*irlrdr3 b w*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 od )ry0tutqvm nkz i+1pgx.6tcg :1 g)0f 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 ma qn 1rtqs)1(jbuy-s8j9z rsd- y be a silent mutation.

2.Outline five causes of gene mutations.

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