Neutrons
The atomic mass is the weight of the protons and neutrons in the nucleus.
The answer is extrachromosomal, or cytoplasmic, inheritance,
or non-Mendelian inheritance. An example in humans is mitochondrion inheritance.
Mitochondria are only passed from mother to offspring since only the egg has mitochondria while sperm does not. The name of the German scientist who
discovered this type of inheritance was
called Carl Correns.
Answer:
All of the statements are true.
The X chromosome is one of the two sex chromosomes of humans and some animals (the other sex chromosome is the Y chromosome). Men have a single X chromosome and women two X chromosomes.
Diseases whose gene is localized on the X chromosome are most often transmitted in the X-linked recessive mode; some are transmitted on the dominant mode related to the X.
In this mode of inheritance, the morbid allele behaves like a recessive trait.
Women heterozygotes are not affected but can transmit the disease; they are aid to be conductive of the disease.
The disese is only manifested in male subjects (XY) with only one copy of the gene (hemizygous subjects)