What three processes can increase v: 4 yt8vpyr/kcn6n*l variation in a population?

  Which of the following statement(s) are possible consequences to a po27eu9pl*iotu lypeptide if a base substitution mutation ociuteu29o7p*l curs?
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 1 of DNAqw1l6qs6av6 n within the human insulin gene. Which sequencesw6 qvan1l66q corresponds to a deletion mutation in the sequence?

  What is a possible cause of a tqa /a :sj,y6tk64baigenetic mutation?

  In species that do not carry out sexual rrl)9i3zj i* rxi2r a;rd*er6yeproduction, what is a possible cause of variation9;yrix6 *e * )adl3rijrrizr2?

  Shown below is the single base substitution mutation 8oa pp5m,4 g/ygo.dcsthat causes sickle cell anaemia in individuals who 8m5 docgs 4/,pygp.oa are homozygous for the allele. Which of the following is a result of this mutation?

  Which statement about mutations in germ and/or somatic cellsl4q8,m iietw46u g +qf is correct?

  This table is a short section of the output from a DNA sequence datn9a9 nb;(z-:b prljgl5 njg* yabase comparing the cytochrome C gene sequence in two species. Wh9zg n:lrbln-j9y(g aj5 pb n*;at does it show?

  A population of plants with no r )nywc0zkrg/ pkj8r,)esistance to herbivores may develop into a population ogzy)j/wr,r c )pnkk08f plants that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organisms have different numbers of genes /fche l3 u-,9-gfxioa ing73a characteristic to them. The table shaeh aggfnfx-i7u 339i,c o/-l ows 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 outcomr0 ag ksys(f/pe.n4/ zz2gh0oes of 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 mut4zotk9ud .bqf f(9wl)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.