within a prokaryotic chromosome E) an ordered display of chromosomes arranged from largest to smallest Topic: Concept 13.1 Skill: Knowledge 2) Which of the following statements about genes is incorrect? A) Genes correspond to segments of DNA. B) Many genes contain the information needed for cells to synthesize enzymes and other proteins. C) During fertilization‚ both the sperm and the ovum contribute genes to the resulting fertilized
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reproductive cells Chromosome: a structure in the nucleus that contains DNA Sister chromatid: one of two chromosomes that are genetically identical and held together at the centromere Centromere: the region where two sister chromatids are held together in a chromosome Spindle fibre: a microtubule structure that facilitates the movement of chromosomes within a cell Centrosome: a structure that helps to form the spindle fibres Genome: the complete DNA sequence of an organism Sex chromosome: an X or Y
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meiosis increase genetic variation? Introduction Most cells in organisms that reproduce sexually are diploid. They have two sets of chromosomes and two complete sets of genes. Gametes are an exception. Gametes are the cells that combine during sexual reproduction. In animals‚ these cells are called sperm and eggs. Gametes are haploid cells with only one set of chromosomes. Meiosis is the process in which haploid cells form from diploid cells. In this lab‚ you will model the steps in meiosis. You will
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affecting a gene to deleting or adding chromosomes. There are approximately 1‚100 genetic disorders. I’m going to talk about Chromosome 5p Deletion. Chromosome 5p deletion is a genetic disorder because it is missing a copy of genetic material. Chromosome 5p deletion is an abnormality that occurs when you’re missing a region of chromosome 5. A Chromosome is a long‚ continuous thread of DNA that consists of numerous genes and regulatory information. Chromosome 5p deletion is also known as Cri du Chat
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like miscarriages and stillbirths. It occurs when one of the X chromosomes is partially or completely missing. Turner syndrome is highly variable and can differ increasingly from one person to another. Affected females can possibly develop a wide variety of symptoms‚ that can affect
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Stored inside chromosomes and contain all instructions for life It is made up of Ribose (sugar)‚ phosphate‚ and when of 4 Nitrogenous bases (Adenine‚ Thymine‚ Guanine and Cytosine) A Nucleotide consists of a Phosphate molecule‚ a sugar molecule‚ and a Nitrogenous base pair The nitrogenous bases always pair up AT and CG Each human has 46 chromosomes 23 pairs in total 1 pair sex chromosomes (that define your sex‚ male XX‚ female XY) 22 pairs of autosomes (non-sex chromosomes) Each pair is
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1) What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? A) There is considerable genetic variation in garden peas. B) Traits are inherited in discrete units‚ and are not the results of "blending." C) Recessive genes occur more frequently in the F1 generation than do dominant ones. D) Genes are composed of DNA. E) An organism that is homozygous for many recessive traits is at a disadvantage. 2) How many unique gametes could be produced through
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arrangement of chromosomes arranged in homologous pairs The chromosome complement of a cell or organism characterized by the number‚ size and morphological features of each chromosome II. Types of Human Genetic disorders a. Human Chromosomal Abnormalities 1. Nondisjunction Occurs when homologous chromosomes fail to segregate during meiosis Produces gametes with three chromosome pairs (trisomy) or only one chromosome of a normal pair (monosomy) Involves any chromosomes‚ including the
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AICE Biology Ch 6 Jones; Ch 10 Raven Content • Replication and division of nuclei and cells • Understanding of chromosome behavior in mitosis Learning Outcomes Candidates should be able to: (a) explain the importance of mitosis in the production of genetically identical cells‚ growth‚ repair and asexual reproduction; (b) [PA] describe‚ with the aid of diagrams‚ the behavior of ( )[ ] chromosomes during the mitotic cell cycle and the associated behavior of the nuclear envelope‚ cell membrane‚ centrioles
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Chapter 12 (Part 2) Explain the principle of independent assortment and its relation to meiosis: The segregation of chromosomes in anaphase I of meiosis explains Mendel’s observation that each parent gives one allele for each trait at random to each offspring‚ regardless of whether the allele is expressed. The segregation of chromosomes at random during anaphase I explains Mendel’s observation that factors‚ or genes‚ for different traits are inherited independently of each other. Apply the
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