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BLG1501 Assignment 2 Semester 1 2026 (641006) - DUE 20 April 2026; 100% Correct solutions and explanations.[ COMPLETE ANSWERS]

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BLG1501 Assignment 2 Semester 1 2026 (641006) - DUE 20 April 2026; 100% Correct solutions and explanations.[ COMPLETE ANSWERS] 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

Unique number: 641006

Due Date: Monday, 20 April 2026, 5:00 PM

BLG1501 – Assignment 2
Unique Number: 641006
Due Date: Monday, 20 April 2026, 5:00 PM

QUESTION 1: Monohybrid Cross of Flower Colour
A purple flower (P) is dominant over a white flower (p), which is recessive.
Step 1: Determine the parental genotypes
 Purple homozygote = PP
 White homozygote = pp
Step 2: Punnett Square for F1 Generation
P P
p Pp Pp
p Pp Pp
 F1 Genotype: 100% heterozygous Pp
 F1 Phenotype: 100% purple flowers
Step 3: F2 Generation (F1 × F1 Cross)
P p
P PP Pp
p Pp pp
 F2 Genotypes:
o PP: 1
o Pp: 2
o pp: 1
 Genotypic ratio: 1 : 2 : 1
 F2 Phenotypes:
o Purple (PP + Pp) = 3
o White (pp) = 1
 Phenotypic ratio: 3 : 1
Explanation: This illustrates Mendel’s law of dominance where the dominant trait (purple)
masks the recessive trait (white) in the heterozygous condition, but the recessive trait can
reappear in the F2 generation.

QUESTION 2
2.1 Differences between Prokaryotic and Eukaryotic Cells
Feature Prokaryotic Cells Eukaryotic Cells
Nucleus No true nucleus; DNA is in True nucleus surrounded by nuclear
Connected book
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Adam Purcell Basic Biology
Publisher: 2018 ISBN: 9780473440145 Edition: Unknown

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