Oak Anthracnose. Anthracnose is a general term used to describe diseases that result in a wide range of symptoms including leaf spots, blotches or distortion, defoliation, shoot blight, twig cankers and dieback on many different deciduous trees and shrubs. In most cases, anthracnose does not cause permanent damage to established trees.
1 Germ cells have only half the number of chromosomes as a diploid cell Â­ one of each pair-and are termed haploid (n) . 2  In a human egg or sperm, there are 23 chromosomes, one of which is an X or Y. 3  The number of chromosomes is reduced from 46 to 23 during the process of meiosis.
Some people like to measure the amount of chromosome material, using ânâ. When an organism is has one chromosome complement, it has just 1n and is considered haploid. This is like human eggs and sperm = there is only one set of the 23 chromosomes. When egg and sperm combine in conception, the zygote is 2n or diploid. This is most of our cells.