In chickens, comb shape is determined by genes at two loci (r, r and p, p). a walnut comb is produced when at least one dominant gene r is present at one locus and at least one dominant gene p is present at a second locus (genotype r_ a rose comb is produced when at least one dominant gene is present at the first locus and two recessive genes are present at the second locus (genotype r_ pp). a pea comb is produced when two recessive genes are present at the first locus and at least one dominant gene is present at the second (genotype rr what will be the phenotypic ratio if a cross is made between a female who is pp rr and a male who is pp rr

Why are adults bigger than they were as children biology

Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles