Bread wheat (Triticum aestivum) has 42 chromosomes. How many linkage groups does it have?

✅Explanation:
-The number of linkage groups in a diploid organism is typically equal to the haploid number of chromosomes. In bread wheat, which is hexaploid (6 sets of chromosomes), the haploid number of chromosomes is 21 (42 chromosomes / 2 sets per chromosome). Therefore, bread wheat has 21 linkage groups.

🔴 Related terminologies:
-Chromosome: A thread-like structure of DNA that contains genes.
-Haploid: Having a single set of chromosomes.
-Diploid: Having two sets of chromosomes.
-Linkage group: A group of genes that are located on the same chromosome and tend to be inherited together.