Abnormalities in the number of x chromosomes tends to have milder phenotypic effects than the same abnormalities in autosomes because of
deletions
nonhomologous recombination
synapsis
x inactivation

answer; ///i believe that the correct answer is (d); ///

a. seed plant structure. 1. the three main plant organs are roots, stems, and leaves. a fourth kind of tissue, meristematic tissue, is responsible for plant growth. meristematic tissue is the only plant tissue that produces new cells by mitosis. plants can lose water out of their leaves as they exchange gases with the air

explanation:

the cell is the smallest structural and functional unit of living organisms, which can exist on its own. therefore, it is sometimes called the building block of life. some organisms, such as bacteria or yeast, are unicellular—consisting only of a single cell—while others, for instance, mammalians, are multicellular.