Suppose a dominant allele (n) codes for a big nose and a recessive allele (n) codes for a small nose. imagine that an organism recessives a dominant allele from its mom and a dominant allele from its dad. what can be determined about its genotype and phenotype

Cells must be in osmotic equilibrium with their surroundings environments because if they swell or shrink thier membranes will rupture

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?

4. multiple crosses were made between true-breeding lines of black and yellow labrador retrievers. all the f1 progeny were black. when these progeny were intercrossed, they produced an f2 consisting of 91 black, 39 yellow and 30 chocolate. a. propose an explanation for the inheritance of coat color in labradors. b. propose a biochemical pathway for coat color determination and indicate how the relevant genes control coat coloration.