What three processes can increase variation tzhsu3 .k 46kbin a population?

  Which of the following statement(s) are possible consequences tc wg5q q:+77.otqdmr0 qf 9mvvo a polypeptide if a base subq q qomcrgf.v+t :vdm7709q5 wstitution 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 exon 1d2 p)t)wv jpw(y- cwyq )vm:f) of DNA within the human insulin gene. Which sequence corresponds to a deletion mutation in the sequencwv)m(qwv: t cyjdp)yp)fw2 ) -e?

  What is a possible cause of a genet,uip m*m .xoa2ic mutation?

  In species that do not carrygz/upd-v,u(p ( 2wl io out sexual reproduction, what is a possible cause of variuz(-(2pwdvo/ ,pilg uation?

  Shown below is the single base substitution mutation that causes si1k9ukmq;n 2 apckle cell anaemia in individuals who are homozygous for the allele. Which o;anqk1 2ukmp9f the following is a result of this mutation?

  Which statement about mutations in germ and/or so:d iq9cb +mg :psiv92zmatic cells is correct?

  This table is a short section of the output from a DNA sequence dw4x s7 ybk;g5tatabase comparing thw kx7g5b s;4yte cytochrome C gene sequence in two species. What does it show?

  A population of plants with no 4k mpqhg l/,3cresistance to herbivores may develop into a population of plants that secrete a compound toxic to herbivores. How cog 3,qm 4lhpck/uld this change occur?

Different species of living organisms /v 3xujmgek-ghe4 4z2have different numbers of genes characteristic to t2egx4-v gzueh/4 3kmj hem. 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 ox z5+d( t;e nwmb 28fzixynu(1f 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 a silendmm1dv0tiw3 vq9((ehsd e ,6.dh4 u edt mutation.

2.Outline five causes of gene mutations.

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