What three processes can increase variation in a pd5 (6 +aiqki2ow; 7m7lib tyktopulation?

  Which of the following stath2ma2pzfl -m0/ i*eruement(s) are possible consequences to a polypeptide if a base substm2hmirlp2u*/ fz -e0a itution 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 1 of DNA hj-nsj0x7zn4 ;y ;ro vwithin the human insulin gene. Which sequence corresponds to a deletion mutation in t740snh j;;on-vrx yjz he sequence?

  What is a possible cause of a genetic mu pa.h,lu a9uw)4mg( sxtation?

  In species that do npt195.s2chdm*z 9tf+pa bk root carry out sexual reproduction, what is a possible cause of variation?cd5 z9s+9ot .rfp*ht2pk am 1b

  Shown below is the single base substitution mutation that causes mu e/5 5.beynfkv:w:msickle cell anaemia in individuals who are homozygous for the allele. Which ey:5m/n5bmef k.wv u:of the following is a result of this mutation?

  Which statement about mutations in germjn o89chma m8.bhx(*l1 vq*yf and/or somatic cells is correct?

  This table is a short section of the output from a DNA seljj ;.+ty:gh gquence database comparing the cytochrome C gene s;jg+.jytghl :equence in two species. What does it show?

  A population of plants with no resistance to herbivores may develop into a popuma*r xbs2iu v- *0fk3e4oj;aylation of plants that secrete a compound toxic to herbivores. How could this change 2ru jm*sx ke04;3aof*iab v-yoccur?

Different species of living organisms have different numbers of genes ch gqz7. 2)a4qcafm(eh2c hjq*8 fg)gik aracteristic to them. The table shows the estimated number of genes for five specie cg( zq2.gfijghh8afke)4m* aq)c7 q2 s.
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 the Huz n*t yja1+l nl5ita93t,q4wvman 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 silent mutatio ua-.0bo+wpdnn.

2.Outline five causes of gene mutations.

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