Mitosis/Meiosis/DNA review 7/8A

Click on the blanks and select the BEST answer for each. Sexual reproduction in animals is called fertilization. It requires sex cells, or gametes, from each parent: the egg from the female and the sperm from the male. Plants also reproduce sexually through pollination.Sex cells are produced by a form of cell division referred to as meiosis,. All other cells in the body are produced by mitosis which is asexual reproduction. In females the production of sex cells occurs in the ovaries and in males the testes. One of the greatest benefits to organisms reproducing sexually is greater genetic diversity because of the mixing of genes from two parents. If the cells in an adult house fly's wing contain 26 chromosomes, how many are found in it's sperm cells? 13 26 52 39 When two haploid cells join together what is produced? An offspring with identical chromosomes. A mutation of the original chromosomes. A Zygote with a complete set of chromosomes. Selection of genes most favorable to the offspring. What is DNA? A tightly wound strand of nucleic acid found in the nucleus of a cell. A segment of a nucleic acid strand on a chromosome that codes for a specific trait. A characteristic that an organism can pass on to its offspring through its genes. A long nucleic acid molecule containing the genetic instructions for the development and functioning of an organism During meiosis what process may occur which increases genetic diversity? Replication Crossover Natural Selection Transcription The Cell Cycle Match the stage of the cell cycle with the correct description. Prophase Chromosomes become visible and spindle fibers form. Cytokinesis Cell membrane pinches in and the cell splits in two. Telophase Chromosomes uncoil and new nuclear membranes form. Metaphase Chromosomes line up across center of cell. Anaphase Chromatids pop apart and migrate to opposite sides of cell. Which BEST describes sexual reproduction in all animals? Egg and sperm join together. Pollen and seed join together. Offspring have traits of only one parent. Offspring are identical to one parent. Some plants can reproduce both asexually and sexually. How does a population benefit from reproducing sexually instead of asexually? It can pass favorable traits to all offspring. It can increase the diversity of inherited traits. It can eliminate unfavorable traits from the gene pool. It can reproduce more rapidly. Which process that occurs during meiosis contributes to a gamete having unique genetic material? replication transcription spindle formation crossing over Which of the following does NOT occur during Interphase? Replicates the DNA Chromatin condenses into chromosomes. Cell grows to mature size Performs its “job” in the body. Match the following descriptions to either Mitosis or Meiosis. Mitosis Two daughter cells Daughter cells are genetically identical Diploid Asexual For growth and repair Meiosis Four daughter cells Daughter cells are genetically different Haploid Sexual For production of gametes