What three processes can increase variation in a population? r,gduj6t7q m5

  Which of the following s4y:6r rtpgi3otatement(s) are possible consequences to a polypeptide if a base subst4ry : goi63rptitution 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 xylr42/zp cu q1)9f:1lmf3cv-x ze ls DNA within the human insulin gene. Which sequence corresponds9p/y)r3 lzle qv2 f cm1c-:lxfx41u sz to a deletion mutation in the sequence?

  What is a possible cause of a genetic mutatprbsv/f8, : (17ykghlz: vma ph2mxh5ion?

  In species that do not carry out,ho 7b n(-rutt sexual reproduction, what is a possible cause of htu b(-r,no7 tvariation?

  Shown below is the single base substitution mutation that causes sickle c 4ywzob lc0dgi3l8q5hu;c6s/ell anaemia in individuals who are homol0yiw /dz8guh c c ql5o36;bs4zygous for the allele. Which of the following is a result of this mutation?

  Which statement about mutations in germ and/or sng+xfkjs063dg zxq 1+omatic cells is correct?

  This table is a short x/p.b43dln ld.2)cz k3 ytrl qsection of the output from a DNA sequence database comparing the cytochrome C gene sequence in two speciesq.4 d p3 2ty./lblrk) 3cxndzl. What does it show?

  A population of plants with no resistance to tdqk t08w(,qaccz g fy-c *03oherbivores may develop into a population of plants that secrete a compound toxic to her- wc0zc30,yd cakfg tqq(t*o8bivores. How could this change occur?

Different species of living organisms have different numberszzi6 bdwuoq:v50w, .dd9tuae hj y)97 of genes characteristic to them. The table shows the estimated j 0q d6de9,uwz .hzb:otiyv5da)9uw 7number 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 pmc9vb06esfck..p x6.+;d3 w nygrcd 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 may be a silent mutatioi+c 6 dv:lini: 6d5q.uxa cu m5/ada(qn.

2.Outline five causes of gene mutations.

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