Track and field facilities are usually designed as multi-purpose facilities (tracks with playing fields inside). Sports facilities for track and field athletics are generally used for daily training as well as for staging regional or local competitions. The staging of competitions at higher levels normally entails more extensive requirements for the sports facility, particularly in respect of the infrastructure. Generally athletics tracks are multiâÂ­purpose with the interior of the 400m track used as a pitch for soccer, gridiron and rugby.
Parents have two genes for pos/neg blood type, and only one of them needs to be positive for the parent to have positive blood type. Most positive-blooded people have oneâ¦ positive gene and one negative gene. If both positive parents pass on their negative gene, they can have a child with a negative blood type.
Someone with type O blood can only give an O allele to a child. If both her parents are O blood type there is no way she can be their biological child and have any blood type other than O. O is a recessive allele meaning you must have two for O. Likewise an AB parent can never have an O type child. And if one Parent has O they can never have an AB. These are the only two types that exclude each other. (A and B types can come in multiple forms (two of the same or one of the blood type and one o allele))