What three processes can increase variation inzh, jv om+g q96,kpk9 1ywqi8hi,gmn+ a population?

  Which of the following statement(s) are possible co /quq76uuazw4wwlg n 581 zu2xnsequences to a polypeptide if aq/wzxnwg4w86l2q7zu 5uuu 1 a base substitution 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 frompdf**j ns/o8 xb2b p8l exon 1 of DNA within the human insulin gene. Which sequence corresponds to a deletion mutation /d opsb8p b 28*nxj*lfin the sequence?

  What is a possible cause of a genetic58)udpnwc7 v ryi,n o4 mutation?

  In species that do not carry out sexual reproduction, what is a possible cau:ekdaq ytf( 26w / enw1wv f4:5wfgyv)se of variatita4:qvef6ng5f /w )w2fyd w:(e vky w1on?

  Shown below is the single base substitution mutation that causes sickle ce7xs90j 6n 7jk2g7h c2 natzhtdll anaemia in individuals who are homozygous for the allele. Which of the following isc 2tdt7j26hz s xh9gn 770anjk a result of this mutation?

  Which statement about x7zp-n jw74mvmutations in germ and/or somatic cells is correct?

  This table is a short section of the output fromixdqqx2h4 t,. a DNA sequence database comparing the cytochrome C gene sequence 2q,dqi.4txxh in two species. What does it show?

  A population of plants with no resistance to herbivores may develop inl02d 7mez2ay qto a population of plants that secrete a compound toxic to herbivores. Hoqza 2dl270eym w could this change occur?

Different species of living organisms have differentbq*(:cx sca(:/+s;nxu ag inf numbers of genes characteristic to them. The table shows the estimated number of genes for five spb;ng( (x c: fa:/a+sc snq*xiuecies.
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 Human Genome Prky3s(n/ l/vk6* ( /9kjta*j spnmeo wloject (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 maqainnj 95dn9wpduf0az z f yp ,9+1s.9 sq-q:my be a silent mutation.

2.Outline five causes of gene mutations.

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