Two parents are trying to determine their offspring phenotype The fathers genotype is (RR) and the Mothers genotype is also (Rr). The allele (R) is dominant and the phenotype is “Brown hair”. The allele (r) is recessive and the phenotype is “ Red hair”. Fill out the punnett square. What is the probability of their child having brown hair.

Effect of rotenone and antimycin a on electron transfer rotenone, a toxic natural product from plants, strongly inhibits nadh dehydrogenase of insect and fish mitochondria. antimycin a, a toxic antibiotic, strongly inhibits the oxidation of ubiquinol. (a) explain why rotenone ingestion is lethal to some insect and fish species. (b) explain why antimycin a is a poison. (c) given that rotenone and antimycin a are equally effective in blocking their respective sites in the electron-transfer chain, which would be a more potent poison? explain.