What three processes can increase variation i6h -qla0y v+f dg .el-xcymr()n a population?

  Which of the following statement(s) are ow*15u;wwke ipossible consequences to a polypeptide if a base substitution mutationkuw1w w 5eio*; 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 fr yy-s0pwoba5 hn*w 4+rgb(;je om exon 1 of DNA within the human insulin gene. Which sowjw b*-4e ;+y(g a5bp0hyrnsequence corresponds to a deletion mutation in the sequence?

  What is a possible cause o h06ua *kqjv vuhr,*/lf a genetic mutation?

  In species that do not carry out sexual reproduction, what is a posad 3,oa;+(ixr+ o/ uncon; ztfsible cause of vazn ntoaf3oa;(u r i+;cdo, x/+riation?

  Shown below is the single base substitution mutasj y 8bwmyw:opos854u (6 bm4vtion that causes sickle cell anaemia in individuals who are homozygous for the allele. Which of the f (8vyo4s moy4wm6 8jbp5 b:wsuollowing is a result of this mutation?

  Which statement about mutations0u ab :kq4tb;r3t(a jr in germ and/or somatic cells is correct?

  This table is a short section of thxz/ c2gclo433,4jvi ftxlwwyv 1dhqn( 7 1:s be output from a DNA sequence database comparing the cytochrov w4ls t3izyjqnxw/fvc2hbo ldx3c17, 1(: 4gme C gene sequence in two species. What does it show?

  A population of plants with no resistance to herbivores may dd; /tl1 k3e*r 8qzwsnuevelop into a population of plants that secrete a compound toxic to herbivores. How could8w/eq dlru *3 ;nzkts1 this change occur?

Different species of living organisms have different numbers of genes characte;zzj) b i-d0ckristic to them. The table shows the estimated number of genes for fizd)-kc bz0 ij;ve 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 of the Human Genome Proi r:wb z:wosv6)l.vo: ject (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 silei14ko :mfd(3o6rhjqa k4 tx )nnt mutation.

2.Outline five causes of gene mutations.

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