Acertain type of flower has two alleles for color (blue, purple), and two alleles for stem height (tall, short). a tall blue flower and a short purple flower are crossed resulting in tall blue flowers , short blue flowers , tall purple flowers , and short purple flowers . what law does this example demonstrate

Law of Independent Assortment.

Explanation:

Mendel’s law of independent assortment states that during meiosis, genes do not influence each other with regard to the sorting of alleles. This means that every possible combination of alleles for every gene is equally likely to happen, so traits have an equal opportunity of occurring together. This means, when two or more characteristics are inherited, those characteristics assort independently during gamete production. The law is only true for traits that are not linked (in this example, flower color and stem height).  

In other words: the inheritance of one trait will not affect the inheritance of another. The calculation of any genotype combination is the probability of the desired genotype at the first locus multiplied by the probability of the desired genotype at the other loci.

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:

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.