What three processes c// : oqtk/qloxm.h*cpan increase variation in a population?

  Which of the following statement/) kyugxa;msw 2ya20x (s) are possible consequences to a polypeptide if a base substitution mutati wx2uxya0y;km/ s 2ga)on 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 withi o3r(4e6vmat sn the human insulin gene. Which sequence corresponds to a deletion mutation in the sa e r63tm4(vosequence?

  What is a possible cause of a geneti1mw -r8v (ewzqc mutation?

  In species that do not carry out sexual resd-6 euss10c sproduction, what is a possible cause of variasdse 06 1usc-stion?

  Shown below is the single base sub4epcw-d/i h1-3k habystitution mutation that causes sickle cell anaemia in individuals who are homozygous for the allele. Which of th3kyhh 4d1-bi cw/-paee following is a result of this mutation?

  Which statement about mutationsocusk *n0 22d3jny(g1gxmq.h in germ and/or somatic cells is correct?

  This table is a short section of the output from a DNA sequence zh 1(mnw *ep16sikyb2 database comparing the cytochrome C gene sequence in two1i*b1nphsz 6yewm (k2 species. What does it show?

  A population of plants with no resistance to herbivores may develop into a f7j+q8z5j,o fxip*fopopulaofj7,p q *o+i8fxf 5jztion of plants that secrete a compound toxic to herbivores. How could this change occur?

Different species of living organisms have different numbers of geerwo e07xe:.9k u 0shgnes characteristic to them. The table shows the estimated number of genes for five species. ks.ee x09:g0 7wuoehr
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 outcomesuyqljya 454 iah:. m0c 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 mutation maycl;cps3rar1;(nyiq 3 be a silent mutation.

2.Outline five causes of gene mutations.

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