You want to use RNA interference to make a fruit fly that lacks the function of gene X only in its antenna - the rest of the fly's body has a functional gene X. Which of the following things would you need to construct an RNAi transgene for this purpose? Check all that apply? 1. A gene X cDNA.
2. A DNA segment containing a fly promoter.
3. An enhancer active only in the antenna.
4. The enhancer of gene X.
5. A DNA segment containing the P element inverted repeat sequence.
6. Genomic DNA 5' and 3' to the transcription start of gene X.

answer; /// i believe that the correct answer is; ///a combination of the birth and death

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: