What three processes can increase w 7e b2xl.qvb)variation in a population?

  Which of the followingahlf 3o5q6i:z(68isb e( gnx a statement(s) are possible consequences to a polypeptide if a base substitution mutatio (i5eila z:safh8b6(3 goq6xnn 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 from7u 0 l+*gb)8cl:ulzc-;jqq)anadbav exon 1 of DNA within the human insulin +a)jnvlq-adcl b: *l;u)8cqg7zua0b gene. Which sequence corresponds to a deletion mutation in the sequence?

  What is a possible cause of a geneta 328)fr2izpz mp:sysic mutation?

  In species that do not carry out sexual reproduction, what is a possib 5o71dr 1ybvsble cause of va oyv1rbb1d57sriation?

  Shown below is the single base substitution mutation thotx (z -cr:imie:z zob3*/f/cat causes sickle cell anaemia in individuals who are homozygous for the allele. Which of the followinz /:i:f mtr ci*o3b/z-e zxo(cg is a result of this mutation?

  Which statement about mutations in germ and/or somatic cells is correct?lzitqxbl ,u 4v*/9ezy h7:. ut

  This table is a short section of the output from a DNA sequed q 90p:qxo hc :o:(eegdk.,) hj7kvdonce database comparing the cytochroc:k qpo o: ,d:9j0( kh7.xgqheode)dv me C gene sequence in two species. What does it show?

  A population of plants with no resistance to txnw)2k rj/ewnb8+m7fqhm7 +herbivores may develop into a population of plants that secrete a compound toxic to herbivores. How could this change ocbe+t+hw7kr /q 7)x wnnm28mj fcur?

Different species of living organisms have different numbers of genes characteriy7fbnum 8rpa 5c)qa7 2stipq7n8 )mry2 uaab7 5fcc to them. 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 of the Hgvpjg: /8((ytzw +btw uman 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 mutations9 op0 ya7me3n.

2.Outline five causes of gene mutations.

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