CHAPTER 29 Multiple Choice ALPHEBETIZED ________ is the most common type of fetal testing. Amniocentesis A chromosomal aberration in which part of a chromosome is lost is known as ________. deletion A female infant is born with several hundred oocytes‚ each one genetically unique. This is due to ________. independent assortment and random crossover An allele that can be masked or suppressed by another allele is said to be __________.Recessive A couple whose blood types are A (IAi) and B
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AP Biology Mid-Term Study Guide 2015 Monitha Patel Chemical Bonding Compounds Sharing of a pair of valence electrons by two or more different atoms Molecule Two or more atoms held together by covalent bonds Ionic Electron attraction between two atoms Cations (+1) and Anions (-1) attract Covalent Sharing of valance electrons between atoms Nonpolar Electrons are shared equally O2 Polar Covalent Unequal sharing of electrons between atoms Two hydrogen atoms are bonded to a single oxygen
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Which of the following is most likely to occur when a tumor-suppressor gene is mutated? - The tumor-suppressor gene and resulting protein may lose its function and ability to suppress cell proliferation. Mutations can produce a polypeptide with increased function. - TRUE ________can convert proto-oncogenes into oncogenes. - Nonsense mutations Most human embryos that are aneuploidy - are spontaneously aborted in the first trimester. Horses and donkeys are closely related species that can
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these deviations. The tendency of the loci on the same chromosome to remain linked together during meiosis and gametogenesis is referred to as linkage. Autosomal linkage : the loci are on the same chromosome‚ affecting the phenotypic and genotypic ratios of the offspring. Recombination can affect linkage by separating the two parental loci‚ this occurs during Prophase I of Meiosis. In sex linked ( X linked ) inheritance‚ alleles on sex chromosomes are inherited in predicable patterns
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Tick (v) if it is a true statement. Chapter 2 Cell Structure and Cell Organisation 1. The cell is the basic unit of life for all organisms. 2. All cells have the same shape and size. 3. All cells have a plasma membrane‚ nucleus and cytoplasm. 4. Protoplasm consists of a plasma membrane and nucleus. 5. The nucleus consists of chromosomes and a nucleolus. 6. Organelles that are found in the cytoplasm of a cell include the nucleus‚ vacuole‚ endoplasmic reticulum‚ mitochondria and Golgi apparatus.
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Chapter 8 Vocabulary- Marisa Brueggemann anaphase- Anaphase is the stage of a cell division (mitosis or meiosis) when the chromatids (or homologous chromosomes in meiosis one) are separated and start to move away from each other. anchorage dependence- In order for a cell to resume its divisions it must be touching something else. asexual reproduction- New cells are generated through the process of mitosis (or binary fusion in the case of bacteria). These new daughter are exactly the same as
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Muneet Dhaliwal Jasmeen Gill Amit Natt Jaideep Bhattal This question is based on the process of Meiosis 1.TOTAL 8 marks Matching. In each space at left‚ place the number of the closely associated statement from the list at right. Each term is correct only once ( 0.5 mark each) Terms: Statements: 2 Meiosis 4 Synapsis 8 Homologous chromosomes 1 Synaptonemal complex 7 Karyotype
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ASEXUAL REPRODUCTION Asexual reproduction is a mode of reproduction by which offspring arise from a single parent‚ and inherit the genes of that parent only; it is reproduction which does not involve meiosis‚ ploidy reduction‚ or fertilization. The offspring will be exact genetic copies of the parent. A more stringent definition is agamogenesis which is reproduction without the fusion of gametes. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the archaea
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cell. 9. The cells divide. The cell membrane is starting to pinch inwards. 10. Cell division is complete‚ resulting in the formation of four cells each with the haploid number. 11. Meiosis - Functions Halving the chromosome number - meiosis consists of two nuclear divisions (meiosis I and meiosis II) but the chromosomes replicate once. Producing four daughter cells. Each are haploid Producing Genetic Variety - through prophase I and through random assortment during metaphase I. In
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Directions: Complete the following quiz‚ which will be submitted to your instructor for a grade. Multiple choice: Select the best answer for each of the following: For questions 1-4‚ you need to know that the grey wolf has a diploid chromosome number of 78. Question 1: What is the haploid number for the grey wolf? User’s Answer: 39 Question 2: How many chromosomes are there in one full set of chromosomes in the grey wolf? User’s Answer: 39 Question 3: How many sets of chromosomes
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