In both american cotton (gossypium hirsutum) and egyptian cotton (g. barbadense) petal spot is a dominant character over no petal spot. when the cross is made within the species, the f2 progeny segregates in a 3: 1 ratio with petal spot character in 75% of the population. however, no clear cut ratio is obtained in respect of the same flower character, when the cross is made reciprocally between the above two species. what is the explanation of this fact?

I would say 4 because genetic drift could cause this if the population is small

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.