Massachusetts Comprehensive Assessment System (MCAS) Biology Practice Test

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How many chromosomes are expected in a haploid cell of a barley plant?

14 chromosomes
7 chromosomes
28 chromosomes
21 chromosomes

The correct answer is: 7 chromosomes

The haploid number of chromosomes in a cell refers to the number of chromosomes present in a gamete, which is the reproductive cell. In barley, the diploid number of chromosomes is typically 14. Since haploid cells contain half of the diploid number, a haploid cell would have 7 chromosomes. This concept is vital in understanding sexual reproduction in plants and the role of gametes, highlighting the importance of haploid and diploid stages in the life cycle of barley and similar organisms. Therefore, a barley plant's haploid cell would indeed possess 7 chromosomes.