Cell division, cell diversity and cellular organisation

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Question 10

In social bees, sex determination is controlled by a haplodiploid system:

Unfertilised eggs develop into haploid male drones ( $n$ ).
Fertilised eggs develop into diploid female workers or queens ( $2 n$ ).
Male drones produce haploid sperm cells ( $n$ ) by mitosis.
Female queens produce haploid egg cells ( $n$ ) by meiosis.

In a particular species of social bee, the haploid genome consists of 18 chromosomes in each gamete.

Given that a single double-stranded DNA molecule consists of two complementary polynucleotide strands, calculate the total number of individual polynucleotide strands of DNA present in a single somatic cell of a female worker bee during prophase of mitosis (after DNA replication has occurred).

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Cell division, cell diversity and cellular organisation Questions

A Level
Biology
Cell division, cell diversity and cellular organisation

A Level
Biology OCR A
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