QUESTIONS Q1 DISCUSS THE CHROMOSOMAL BASICS OF SEX DETERMINATION The chromosomal basis of sex varies with the organism. In most species‚ sex is determined by the presence or absence of special chromosomes. As a result of meiotic segregation‚ each gamete has one sex chromosome to contribute at fertilization. Sex determination is strictly chromosomal and is not usually influenced by the environment. There are two types of sex namely Heterogametic sex: The sex that produces two kinds of gametes
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cells divide? A. B. C. D. By mitosis By meiosis By budding By binary fission 5. What can the extracellular matrix of cells be made of ? A. B. C. D. I. II. Polysaccharide Glycoprotein III. Phospholipid I only I and II only II and III only I‚ II and III Turn over 2209-6007 – 4 – 6. M09/4/BIOLO/HPM/ENG/TZ1/XX+ During which phase of the cell cycle do chromosomes duplicate? A. B. C. D. G1 S G2 Mitosis 7. Which diagram represents
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following characteristics except that A) they are both present in pairs in all diploid cells. B) they both undergo segregation during meiosis. C) their copy numbers in the cell decrease after meiosis‚ and increase during fertilization. D) they are both copied during the S phase of the cell cycle. E) they both pair up with their homologues during prophase of mitosis. Answer: E Topic: Concept 15.1 Skill: Knowledge 2) The improvement of microscopy techniques in the late 1800s set the stage
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the chromosomes of an organism‚ providing it with a genome-wide photo of homologous chromosomes of the individual’s cell (karyotype). The way that this is done is that a cell sample is collected and it stops the cell division during metaphase (in mitosis). Then the sample is stained‚ which produces a banding pattern on the chromosomes that is visible under a microscope. Now with this information we can reveal changes in chromosome number associated with aneuploid (abnormal number of chromosomes) conditions
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SBI4U Exam Review Topic 1 1. The table below shows the level of hemoglobin measured in two different groups of athletes. Hemoglobin / grams per 100 cm3 Number of athletes tested Standard deviation / grams per 100 cm3 Group A 12.6 200 0.8 Group B 11.9 220 3.2 Which of the following statements is correct? A. Results from group B are more accurate because more athletes were tested. B. Results from group B are more reliable because it has a higher standard deviation. C.
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Name: ________________________ Class: ___________________ Date: __________ ID: A Genetics test questions Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. Pea plants were particularly well suited for use in Mendel’s breeding experiments for all of the following reasons except that a. peas show easily observed variations in a number of characters‚ such as pea shape and flower color. b. it is possible to completely control matings
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dihybrid cross showing independent assortment is expected to be A) 1:2:1. B) 3:1. C) 9:1:1:3. D) 3:9:9:1. E) 9:3:3:1. 5) Mendel’s law of independent assortment states that A) chromosomes sort independently of each other during mitosis and meiosis. B) genes sort independently of each other in animals but not in plants. C) independent sorting of genes produces polyploid plants under some circumstances. D) each pair of alleles segregates independently of the other pairs of alleles
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BIOLOGY 1201‚ Section #2 Spring‚ 2014 (MWF 9:30-10:20 AM) Instructor: Dr. Terry M. Bricker Office: A606 Life Science Annex (Laboratory‚ A623 – check the lab if I am not in the office!) Phone: 225-578-1555 E-mail: btbric@lsu.edu -- E-mail is an excellent way to contact me or ask questions. Office Hours: M‚Tu 3:30-4:30‚ or by appointment. - Please see me if you have questions or problems. COURSE: BIOL 1201‚ General Biology‚ 3 credit hours. Biology 1201 is a course intended for students that are majoring
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Chapter 2.0 Cell Structure and Functions Prokaryotic and Eukaryotic cell Cell are grouped into tissue Cell as a unit of life Prokaryotic and eukaryotic cells Structure and functions: cell membrane Microscopic and structures of organelles plant and animal cell Cell prokaryotic theory eukaryotic Plasma membrane Organeles - Nucleus - mitochondria Plant cell Animal cell - ruogh and smooth endoplasmic reticulum -Golgi body --ribosome --lysosome compare --chloroplast --centriole animal plant
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causes Gene Mutation? → Gene mutations are most commonly caused as a result of two types of occurrences. 1. Environmental factors Ex) chemicals‚ radiation‚ and ultraviolet light from the sun can cause mutations. 2. Errors made during mitosis and meiosis → Common errors that occur during cell division can result in point mutations and frame shift mutations. Mutations during cell division can lead to replication errors which can result in the deletion of genes‚ translocation of portions of
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