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GQ7
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- QUESTION 25 To visualize and identify meiotic cells at metaphase I with a microscope, what would you look for? O a. sister chromatids of a replicated chromosome grouped at the poles O b. individual chromosomes all at the cell's center O c. an uninterrupted spindle array Od. pairs of homologous chromosomes all aligned at the cell's centerQuestion 11 If a father has li, he will have O two types of sperms: I and i. O one type of sperm: i 1910 one type of sperm:Pi two types of sperms: 1, 1910Question 50 Each strand of a homologous chromosome is called a: O Sister Chromatid O Chromatin O Non-sister Chromatid O Tetrad
- Question 15 Cell differentiation in most animals results in O The building of the many tissues of the body O Three body layers O All of the above O The formation of endoderm, mesoderm and ectoderm tissues O Cells shutting some gene books and opening othersQUESTION 8 Match the stages of mitotic cell division to the descriptions of those stages. ]chromosomes attach to spindle fibers across the middle of the cell chromosomes are not yet duplicated so chromosomes only look like a line, Jonly one pair of centrioles in cell A. Cytokinesis cell membrane is pinching in forming a peanut-shaped cell, daughter chromosomes reach the poles and new nuclear membranes are forming around them B. Anaphase C. Telophase D. Early Interphase the nuclear membrane is breaking down, chromosomes are condensing, centrioles are building microtubule "highways" (spindle fibers) E. Prophase chromosomes are duplicated so chromosomes look like an "X", two pairs of centrioles and double the amount of organelles fill the cell F. Late Interphase cell is dividing into two identical cells G. Metaphase daughter chromosomes are beginning their migration to the poles on spindle fibersQUESTION 4 A person with XXY sex chromosomes will typically: Develop as male, because they have the SRY gene Develop as female, because they have 2 X chromosomes O Die before birth, because they have an odd number of chromosomes Have undescended testes
- Question 12 You are investigating gene interaction in guinea pigs. When you cross two heterozygous wild type black guinea piega you get 12. offspring in total, 18 wild type black guinea pigs and 14 mutant white guinea pigs. What kind of interaction are the genes governing fur color displaying here? O Recessive epistasis O No interaction Pleiotropy O Complementary O Dominant epistasisQUESTION 4 The observable physical properties of an organism make up its: O genotype heterozygosity phenotype O ploidy O O O OQUESTION 10 Click directly on the chromosomal location named 2q22. You can click on either chromatid, but make sure you are clicking directly on the precise location. 3. 3 4 1 3 4 IMII ক - D
- Question 31 Considering the location of gemes in the interphase nucleus, certain chromosomal territories appear to exist. Specifically, O gene-poor regions of thromosomes are located outside the nucleus, whereas gene-rich regions of chromosomes are located inside the nucleus O even-numbered chromosomes are located in the interior of the nucleus, whereas odd-numbered chromosomes are located peripherall O each chromosome appears to occupy a discrete domain O arge chromosomes are more likely to be located in the center of the nucleusD Question 3 et Two pure breeding lines of pea are crossed. One is purple-flowered and tall, the other white- flowered and short. The F1 is purple-flowered and tall. Crossing the F1 to the white and short parent results in phenotypic and genotypic classes. O 4,2 O 3, 4 O 2,2 O 4,4 O 24Question 7 ffnn is homozygous O heterozygous O homozygous dominant