Arborjet > Diseases > Anthracnose. Anthracnose (leaf blight) is a fungus that winters on twig tissue on the tree. In the spring, spores are transported to new buds and shoots. The disease is enhanced by cool, wet conditions. Infected leaves develop tan to reddish brown lesions that extend along the veins of the leaf.
These tables give the total number of chromosomes (including sex chromosomes) in a cell nucleus. For example, human cells are diploid and have 22 different types of autosome, each present as two copies, and two sex chromosomes. This gives 46 chromosomes in total.
A cell is diploid if it contains exactly two copies of each chromosome. A cell is haploid if it contains exactly half of a speciesâ typical full set of genetic material. Haploid cells are often used in sexual reproduction. In cells, ploidy defines the number of copies of a chromosome found within the cell. The number of the basic set of chromosomes is described as the monoploid number. Most cells within a human (and other animals) are diploid, which means they have two copies of each chromosome.