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Blg1501 Assignment 2 (Detailed Answers) Semester 1 2026 - Distinction Guaranteed

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BLG1501 Assignment 2 (DETAILED ANSWERS) Semester 1 2026 - DISTINCTION GUARANTEED - DISTINCTION GUARANTEED - DISTINCTION GUARANTEED Answers, guidelines, workings and references... QUESTION 1 A purple flower (P) is dominant, and the white flower (p) is recessive. Use the Punnet square to predict the results of this monohybrid cross between a purple homozygote flower and a white homozygote flower and state the phenotypic and genotypic ratios of the F2 generation. [20] QUESTION 2 2.1 Tabulate the differences between prokaryotic and eukaryotic cells. (14) 2.2 Write explanatory notes on the structure and function of ribosomes. (10) [24] QUESTION 3 List the phases of meiosis I and meiosis II and describe the events characteristic of each phase. [25] QUESTION 4 4.1 Distinguish between parasitism, mutualism, and commensalism and give examples of each symbiotic relationship (9) 4.2 Briefly explain the four major threats to biodiversity and give an example of each. (12)

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BLG1501
Assignment 2 Semester 1 2026
Unique number:
Due Date: 20 April 2026

Detailed solutions, explanations, workings
and references.


+27 81 278 3372

, QUESTION 1

F1 Generation – First Cross (PP × pp)

Parents:

Purple (homozygous dominant) = PP

White (homozygous recessive)= pp

Gametes:

PP produces only P gametes.

pp produces only p gametes.

Punnett Square (F1 Generation):
P P
p Pp Pp
p Pp Pp

F1 Genotype = All offspring are Pp (heterozygous).

F1 Phenotype = All offspring have purple flowers (since P is dominant).




F2 Generation – Second Cross (Pp × Pp)

We now cross two heterozygous purple-flowered plants (Pp × Pp).

Punnett Square (F2 Generation):

P p

P PP Pp

p Pp pp

Genotypic Ratio (F2)



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Adam Purcell Basic Biology
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