A stroke occurs when blood flow to a part of the brain stops. A stroke is sometimes called a brain attack.. If blood flow is cut off for longer than a few seconds, the brain cannot get nutrients and oxygen. Brain cells can die, causing lasting damage.
A cell is said to be homozygous for a particular gene when identical alleles of the gene are present on both homologous chromosomes. The cell or organism in question is called a homozygote. True breeding organisms are always homozygous for the traits that are to be held constant.
Best Answer: Well, homozygous means same so a homozygous recessive trait would be a same [with parents] trait that is not the stronger trait which is dominant. Dominant= stronger showing trait, recessive= weaker trait. If you are dealing with Punnett squares then tt= homozygous recessive and TT= homozygous dominant.est Answer: Well, homozygous means same so a homozygous recessive trait would be a same [with parents] trait that is not the stronger trait which is dominant. Dominant= stronger showing trait, recessive= weaker trait. If you are dealing with Punnett squares then tt= homozygous recessive and TT= homozygous dominant.