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Animal Cell - Genetics and Evolution - Exam, Exams of Genetics

AMET UniversityGenetics

Annotated Diagram, Anaphase, Mitosis, Prophase of Mitosis, Cytokinesis, Process of Mitosis, Interphase, Recessive Allele. Past exam paper for biological courses are available here. I expect people will get some help if they need.

Typology: Exams

2011/2012

Uploaded on 11/30/2012

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ARHOLIADAU EXAMINATIONS
SEMESTER ONE EXAMINATIONS, 2012
INSTITUTE OF BIOLOGICAL, ENVIRONMENTAL AND RURAL SCIENCES
BR00710 GENETICS AND EVOLUTION
Time allowed: TWO HOURS
Answer ALL questions in the space provided on the question paper.
Rhif Cyfeirio’r Myfyriwr/
Student Reference Number:
Dyddiad/Date
Ystafell Arholiad/Examination Room
Rhif y Sedd/Seat Number
1. Rhowch y wybodaeth angenrheidiol yn y
blychau uchod a rhowch eich enw yn y man
gwag ar dop y tudalen ar y dde. Plygwch a
seliwch y cornel ochr dde ar dop y tudalen (gan
ddefnyddio’r slip gludiog a ddarperir) er mwyn
cuddio eich enw.
2. Rhaid i’r atebion fod wedi eu hysgrifennu’n glir.
Gall yr Arholwyr nail ai anwybyddu sgript
annealladwy, neu drefnu i’w theipio a chael yr
ymgeisydd i gwrdd â chost y gwaith.
3. Ysgrifennwch eich atebion mewn inc.
4. Ni ddylid torri allan unrhyw ran o’r llyfr hwn; rhaid
ei ddychwelyd mewn ffurf gyflawn.
5. Os ymadewch â’r ystafell arholi yn gynnar,
gwnewch hynny’n dawel os gwelwch yn dda
rhag aflonyddu ar ymgeiswyr eraill.
1. Please give the information requested above
and enter your name in the space provided at
the top right of this page. If your answers are to
be marked under a scheme approved by the
College whereby the examiners will not know
your identity, fold over and seal down the top
right-hand corner (using the gummed slip
provided) in order to conceal your name.
2. The answers must be legibly written. The
Examiners can either ignore illegible script or
have it typed and the expense of typing charged
to the candidate.
3. Write your answers in ink.
4. This paper must be handed in complete.
5. If you leave the examination early, please do so
quietly so as not to disturb other candidates.
Fold over and stick down/plygwch y gornel drosodd
Cyfenw/Surname ............................................
Enwau Cyntaf/
Forenames......................................................
.......................................................................
pf3
pf4
pf5
pf8

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ARHOLIADAU EXAMINATIONS

SEMESTER ONE EXAMINATIONS, 2012

INSTITUTE OF BIOLOGICAL, ENVIRONMENTAL AND RURAL SCIENCES

BR00710 GENETICS AND EVOLUTION

Time allowed: TWO HOURS

Answer ALL questions in the space provided on the question paper.

Rhif Cyf Student Reference Number:eirio’r Myfyriwr/

Dyddiad/Date Ystafell Arholiad/Examination Room Rhif y Sedd/Seat Number

  1. Rhowch y wybodaeth angenrheidiol yn y blychau uchod a rhowch eich enw yn y man gwag ar dop y tudalen ar y dde. Plygwch a seliwch y cornel ochr dde ar dop y tudalen (gan ddefnyddio’r slip gludiog a ddarperir) er mwyn cuddio eich enw.
  2. Rhaid i’r atebion fod wedi eu hysgrifennu’n glir. Gall yr Arholwyr nail ai anwybyddu sgript annealladwy, neu drefnu i’w theipio a chael yr ymgeisydd i gwrdd â chost y gwaith.
  3. Ysgrifennwch eich atebion mewn inc.
  4. Ni ddylid torri allan unrhyw ran o’r llyfr hwn; rhaid ei ddychwelyd mewn ffurf gyflawn.
  5. Os ymadewch â’r ystafell arholi yn gynnar, gwnewch hynny’n dawel os gwelwch yn dda rhag aflonyddu ar ymgeiswyr eraill. 1. Please give the information requested above and enter your name in the space provided at the top right of this page. If your answers are to be marked under a scheme approved by the College whereby the examiners will not know your identity, fold over and seal down the top right provided) in order to conceal your name.-hand corner (using the gummed slip 2. The answers must be legibly written. The Examiners can either ignore illegible script or have it typed and the expense of typing cha to the candidate. rged 3. Write your answers in ink. 4. This paper must be handed in complete. 5. If you leave the examination early, please do so quietly so as not to disturb other candidates.

Fold over and stick down/plygwch y gornel drosodd Cyfenw/Surname ............................................ Enwau Cyntaf/ Forenames...................................................... .......................................................................

  1. (a) The diagram represents the nucleus of an animal cell (2n = 4) in early prophase of mitosis.

In the space below draw an annotated diagram to show what happens in the cell at anaphase of mitosis. Label three structures clearly in on your diagram. (5 marks)

(b) What do you understand by the term cytokinesis? (1 mark) …………………………………………………………………………………………………………. ………………………………………………………………………………………………………… (c) What is the purpose and significance of the process of mitosis? (2 marks) ……………………………………………………………………………………………………………… ……………………………………………………………………………………………… ……………… (d) Where in a plant would this process occur? (1 mark) ………………………………………………………………………………………............ (e) What event must occur during interphase before mitosis can occur? (1 mark) …………………………………………………………………………………………………

  1. Maize plants have kernel colour brown (B) that is dominant to yellow kernels (b ) and that round shape is (R) is dominant to wrinkled shaped kernels (r). (a) Show the result of a cross between a homozygous dominant maize plant, with a homozygous recessive maize plant. (Assume that the alleles concerned were on different chromosomes.) (4 marks) Parent phenotypes …………………………………….. x …………… ……………………… Parent genotypes ……………….. x …………………...… Gametes …..…………… x ………………..…… F1 phenotype(s) and F1 genotype(s) …………………………………………………………………………………………………………… (b) Show the result of crossing two F1 individuals together by drawing a Punnett square/genetic diagram below. (6 marks)

(c) What is the expected phenotypic ratio? (1 mark) ………………………………………………………………………………………………………….

(d) List the different phenotypes produced in the same order as you have given in the ratio above. (2 marks) …………………………………………………………………………………………………………. …………………………………………………………………………………………………………. (e (^) phenotypes.Account for the appearance of new phenotypes when there were only two original parental (1 mark)

……………………………………………..………………………………………………………………

…………………………………………………………………..…………………………………………

  1. Complete the following table with ticks for a true statement. (6 marks) Statement DNA mRNA tRNA Attaches to a ribosome Carries an amino acid Translated Transcribes but not translated Site of anticodon Site of codon

For the following length of DNA , write out the base sequence on its corresponding length of mRNA. (4 marks) T A C C G T C G G A C T T G C G C A T A T

  1. Describe THREE ways in which meiosis introduces variation. (3 marks)
    1. …………………………………………………………………………………………………….
    2. ………………………………………………………………………………………………………
    3. ………………………………………………………………………………………………………
  2. Complete the table below giving FOUR differences between DNA and RNA in cells. (8 marks)

DNA RNA

  1. Natural selection involves selection pressures altering the frequency of alleles/characteristics in a population.specific example for Draw and annotate two of the graphs. three graphs to illustrate these selection pressures. (6 marks) Name a
  2. Consider the evolution of giraffes from a basic short necked ancestor. (i) Which type of selection pressure (see A-G below) was involved? ……………………………………………………………… (ii) Re order the following statements using the letters to describe natural selection. Note that there is more than one correct sequence. A B (^) There is competition between individuals and a struggle for existenceSurvivors pass on their favourable alleles to the next generation C Overproduction of offspring E F Over successive generations the alleles frequency in the population changesThere is variation in any population G Most populations maintain fairly constant numbers Order ……………………………………………………………………………………… (Total 5 marks)
  3. Explain, with reference to evolution, the differences between analogous and homologous structures. Give examples. (Total 5 marks)
  1. Discuss the types and causes of variation in organisms with reference to the data below. (Total 10 marks) Table of average DIFFERENCES in selected characteristics between pairs of twins.

Differences in

50 Pairs of i dentical twins reared together

50 Pairs of non- identical twins reared together

19 Pairs of identical twins reared apart

Height 9cm) 1.7 4.4 1. Weight (lb) 4.1 10.0 9. Head length (cm) 2.9 6.2 2. Head width (cm) 2.8 4.2 2. I Q (intelligence) 3.1 8.5 6.

………………………………………………………………………………………………………… ……………………………………......................................................................................… ………………………………………………………………………………………………………... ………………………………………………………………………………………………………… ……………………………………..................................................................................……… ………………………………………………………………………………………………………... ………………………………………………………………………………………………………… ……………………………………..................................................................................……… ………………………………………………………………………………………………………… ………………………………………………………………………………………………………… ……………………………………......................................................................................… ………………………………………………………………………………………………………... ………………………………………………………………………………………………………… ……………………………………..................................................................................……… ………………………………………………………………………………………………………...

END OF PAPER