, BLG1501 Assignment 2
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, and a white flower (p) is recessive.
Parental Genotypes
Purple homozygote: PP
White homozygote: pp
F1 Genotype: 100% heterozygous (Pp)
F1 Phenotype: 100% purple flowers
F2 Generation Punnett Square
P p
P PP Pp
p Pp pp
F2 Genotypes: PP: 1, Pp: 2, pp: 1
Genotypic Ratio: 1 : 2 : 1
F2 Phenotypes: Purple (PP + Pp) = 3, White (pp) = 1
Phenotypic Ratio: 3 : 1
Explanation: The dominant purple trait masks the recessive white trait in heterozygotes. In
the F2 generation, the recessive trait reappears, illustrating Mendel’s principle of dominance.
QUESTION 2
2.1 Differences between Prokaryotic and Eukaryotic Cells
Feature Prokaryotic Cells Eukaryotic Cells
Nucleus No true nucleus; DNA True nucleus surrounded by
in nucleoid nuclear membrane
Cell size Small (1–10 μm) Larger (10–100 μm)
Membrane-bound Absent Present (mitochondria, ER,
organelles Golgi, etc.)
DNA Circular, single Linear, multiple chromosomes
chromosome
Cell division Binary fission Mitosis and meiosis
Ribosomes 70S, smaller 80S, larger
Examples Bacteria, Archaea Plants, Animals, Fungi, Protists
Explanation: Prokaryotic cells are simple and lack compartmentalized organelles. Eukaryotic
cells are complex, with specialized organelles for specific cellular functions.
2.2 Ribosomes – Structure and Function
Structure:
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, and a white flower (p) is recessive.
Parental Genotypes
Purple homozygote: PP
White homozygote: pp
F1 Genotype: 100% heterozygous (Pp)
F1 Phenotype: 100% purple flowers
F2 Generation Punnett Square
P p
P PP Pp
p Pp pp
F2 Genotypes: PP: 1, Pp: 2, pp: 1
Genotypic Ratio: 1 : 2 : 1
F2 Phenotypes: Purple (PP + Pp) = 3, White (pp) = 1
Phenotypic Ratio: 3 : 1
Explanation: The dominant purple trait masks the recessive white trait in heterozygotes. In
the F2 generation, the recessive trait reappears, illustrating Mendel’s principle of dominance.
QUESTION 2
2.1 Differences between Prokaryotic and Eukaryotic Cells
Feature Prokaryotic Cells Eukaryotic Cells
Nucleus No true nucleus; DNA True nucleus surrounded by
in nucleoid nuclear membrane
Cell size Small (1–10 μm) Larger (10–100 μm)
Membrane-bound Absent Present (mitochondria, ER,
organelles Golgi, etc.)
DNA Circular, single Linear, multiple chromosomes
chromosome
Cell division Binary fission Mitosis and meiosis
Ribosomes 70S, smaller 80S, larger
Examples Bacteria, Archaea Plants, Animals, Fungi, Protists
Explanation: Prokaryotic cells are simple and lack compartmentalized organelles. Eukaryotic
cells are complex, with specialized organelles for specific cellular functions.
2.2 Ribosomes – Structure and Function
Structure:
