In cats, the X-linked allele O converts the black pigment found in the fur into an orange pigment. Heterozygous females are mosaics of orange and black pigmented fur. The autosomal dominant allele W prevents the deposition of any pigment at all in the fur. A white female cat is mated […]

Two immune system questions: Activated T-helper cells aid in humoral immune responses by releasing cytokines which promote antibody production, phagocytosis, neutralization and apoptosis. Which parts of this statement are false and why? I know cytokines activate B cells and cytotoxic T cells, and the interferons are cytokines as well. Membrane […]

Your organs are composed of the four tissue types; epithelial, connective, muscle, and nervous tissues. Organs are wondrous things, each one with a different function vital to the homeostasis of your body. While it is easy for us to view a particular organ as a single item, it is in […]

Q1. What unique aptitude do DNA molecules have? Why is this ability so important? What are the similarities and differences in DNA and RNA? What are the respective functions in general and in protein systhesis? What are some things that might damage genes?Q2. As a biologist it is your job […]