Question

a) According to Allen's rule regarding relative limb length and environmental conditions, we would expect to find a relationship between cormic index and climate, growth, and development. A higher cormic index corresponds to relatively shorter legs, while a lower cormic index corresponds to relatively longer legs. Are your body proportions characteristic of ancestry in a cold climate (cormic index above 0.5) or warm climate (cormic index below 0.5)? b) Are genetic adaptations to climate solely responsible forthe variation observed in human body proportions across the globe? What other factors may influence an individual's relative body proportions?

Answer 1

Cormic index has been defined as the ratio of the sitting height to total height. Here the question asked are your body proportion characteristics st ancestry in cold climate on warm climate? so to calculate this you have to mas measure your sittining height and your stature (height). and then apply the above formula (sitting height/ stature) x 100 There is a sacial and ethnic variation in mean conmic index. Conmic index has been used as a valid means to study body size as has been observed in many population. In case of me the conmic index will be below the 0.5 because a am a nesidant of warm climatic continent. enerally influeneed by a complex assay of factors sanging from gene to environment. We can say that, phenotypic variance = vp=VGT VET VGE. So this variation occurs due to genetic variance (vol. environmental variance (VE) and interaction between gene and environment (OVGE). The VG again depends on - - VG = VAT VO + VI VA = Additive genetic variance, VD = Dominant genetic variance. VI = Genetic interaction variance, Ve depends on climate. VGE depends on nutrition and is good then there is ends on nutrition and immunity. When nutrition then there is chances of being longen in height.