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Multiple Choice
Which of the following is true of a species that has a chromosome number of 2n = 16?
A
The species has 32 individual chromosomes.
B
The species has 8 pairs of homologous chromosomes.
C
The species has 8 individual chromosomes.
D
The species has 16 pairs of homologous chromosomes.
Verified step by step guidance
1
Understand the notation: In the expression '2n = 16', '2n' represents the diploid number of chromosomes, which means the total number of chromosomes in a somatic cell of the species.
Identify the meaning of 'n': The 'n' represents the haploid number, which is the number of chromosomes in a gamete (sperm or egg cell). Therefore, 'n' is half of the diploid number.
Calculate the haploid number: Since '2n = 16', divide 16 by 2 to find 'n'. This gives 'n = 8', meaning there are 8 chromosomes in a gamete.
Determine the number of homologous pairs: In a diploid organism, chromosomes exist in pairs. Since 'n = 8', there are 8 pairs of homologous chromosomes in the diploid cells.
Review the options: Based on the calculations, the correct statement is 'The species has 8 pairs of homologous chromosomes.'