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Genetic distances measured with recombination rates are approximately additive: if the distance from gene A to gene B is 15 m.u. and the distance from gene B to gene C is 20 m.u., the distance from gene A to gene C is 35 m.u. A female mouse is heterozygous for the three linked genes described.
The stages of cell division oversee the separation of identical genetic material into two new nuclei, followed by the division of the cytoplasm. Animal cell mitosis is divided into five stages—prophase, prometaphase, metaphase, anaphase, and telophase—visualized here by light microscopy with fluorescence.
There are two ways cell division can happen in humans and most other animals, called mitosis and meiosis. When a cell divides by way of mitosis, it produces two clones of itself, each with the same number of chromosomes. When a cell divides by way of meiosis, it produces four cells, called gametes.
B5 mitosis & meiosis exam questions and mark scheme. Q1. The diagram shows a human cell and some of its contents. (a) Choose words from this list to label the diagrams. chromosome cytoplasm gene nucleus. (3) (b) Choose words from this list to complete the sentence. a body cell an egg cell a gamete a sperm cell.
1. Understand how and why linkage can produce deviations from Mendelian ratios. 2. Illustrate the evidence for linkage from the shortage of recombinants in two- point crosses in. both Mendel's sweet peas and Drosophila. 3. Know how to work out relative distances between two loci in a two-point cross. 1.
How are chromosomes moved across the cell during mitosis? In your explanation, summarize the diagrams in Figure 9.9, and jump back to Figure 4.21 to get an image of "chromosome walking."
How a cell divides to make two genetically identical cells. Prophase, metaphase, anaphase, and telophase.
