A scientist who studies the interactions or interrelationships between organisms and their physical environment is an Ecologist.
Fruits, flowers, roots, and stems
I'm guessing the genotypes given (RRYY x Rryy) are the offspring (if this isn't the case this answer may be wrong)
RRYY has both dominant alleles. So we can safely say that the parents are both RRYY.
For Rryy :
Rr is heterozygous (the alleles are not the same), so the parents could be:
RR x rr
RR x Rr
Rr x Rr
(if you do a small punnet square, you can double check these!)
Since yy has both recessive alleles, the parent is yy as well.
The common or popular term used to define an 'anticipated length of a person's life' is Life Expectancy. However other terms can be used such as Life Span, Longevity or a person's period of existence.
Regardless of the term used, the calculation of a person's anticipated length of life should remain the same. This should include: birth year, current age, and use of demographic factors including gender, sex, race etc.
