The expected ratio of phenotypes among the progeny of a test cross is 1: 1: 1: 1. out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. given this information, which of the following must also be true? view available hint(s) the expected ratio of phenotypes among the progeny of a test cross is 1: 1: 1: 1. out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. given this information, which of the following must also be true? since 48 is so close to the expected value, there is no need to calculate chi square before drawing a conclusion about the ratio. the value of observed - expected for this cell = -2. at least one additional cell must also contain a count of 48. the progeny of this cross do not conform to a 1: 1: 1: 1ratio.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.