What feature of dna replication makes it semi-conservative

The feature of DNA replication that makes it semi-conservative is the creation of new DNA strands from old DNA strands.

Explanation:

DNA replication occurs semi-conservatively because it is from two old DNA strands that the new DNA strands will emerge. Each new strand is complementary to the old strand, so the genetic code is retained in the new DNA molecules. Replication is initiated from single sources and usually occurs bi-directionally from each replication source. Replication fidelity is very high, with an average of only one error per billion nucleotides incorporated after error synthesis and correction during and immediately after replication.

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: