Refer to diagrams in your textbook and the good websites in Senior
... 2 TYPES OF CELL DIVISION - MEIOSIS AND MITOSIS ♦ Meiosis is the process of cell division that forms the gametes (male sperm or pollen, and female ovum). One diploid cell (2n) in the male or female reproductive organs (testes and ovaries) produces 4 haploid/monoploid cells (1n). These 4 cells become ...
... 2 TYPES OF CELL DIVISION - MEIOSIS AND MITOSIS ♦ Meiosis is the process of cell division that forms the gametes (male sperm or pollen, and female ovum). One diploid cell (2n) in the male or female reproductive organs (testes and ovaries) produces 4 haploid/monoploid cells (1n). These 4 cells become ...
Standard B-5 - Wando High School
... It is essential for students to understand the process of meiosis and its importance to sexual reproduction just as mitosis is to asexual reproduction (see B-2.6). In order for the offspring produced from sexual reproduction to have cells that are diploid (containing two sets of chromosomes, one set ...
... It is essential for students to understand the process of meiosis and its importance to sexual reproduction just as mitosis is to asexual reproduction (see B-2.6). In order for the offspring produced from sexual reproduction to have cells that are diploid (containing two sets of chromosomes, one set ...
Genetics
... Independent Assortment: one of Mendel’s principles that states that genes for different traits can segregate independently during the formation of gametes Accounts for the many genetic variations in plants, animals, etc. Mendel’s principles of heredity, observed through patterns of inheritance, fo ...
... Independent Assortment: one of Mendel’s principles that states that genes for different traits can segregate independently during the formation of gametes Accounts for the many genetic variations in plants, animals, etc. Mendel’s principles of heredity, observed through patterns of inheritance, fo ...
genetic concepts
... result of the reduction division is only one set of chromosomes usual condition (46 chromosomes) arises after fusion of nuclei fertilization > restoration duplication of genetic information one gene of male and one of female origin give rise to a particular feature ...
... result of the reduction division is only one set of chromosomes usual condition (46 chromosomes) arises after fusion of nuclei fertilization > restoration duplication of genetic information one gene of male and one of female origin give rise to a particular feature ...
CHAPTER 14 VOCAB
... aneu- without (aneuploidy: a chromosomal aberration in which certain chromosomes are present in extra copies or are deficient in number) cyto- cell (cytological maps: charts of chromosomes that locate genes with respect to chromosomal features) hemo- blood (hemophilia: a human genetic disease caused ...
... aneu- without (aneuploidy: a chromosomal aberration in which certain chromosomes are present in extra copies or are deficient in number) cyto- cell (cytological maps: charts of chromosomes that locate genes with respect to chromosomal features) hemo- blood (hemophilia: a human genetic disease caused ...
Fruit Flies…
... essential to blood clotting. People who do not have factor VIII have a condition called hemophilia a • __________________________ (more common in males…only 1 X chromosome) • _________________________ Absence of protein ...
... essential to blood clotting. People who do not have factor VIII have a condition called hemophilia a • __________________________ (more common in males…only 1 X chromosome) • _________________________ Absence of protein ...
DATE - MrD-Home
... 4. Gamete formation in males is different than in females because A. in males, meiosis begins before birth and stops until puberty B. in males, meiosis II occurs before meiosis I C. in males, there is equal distribution of cytoplasm into four cells D. in males, there is unequal distribution of cytop ...
... 4. Gamete formation in males is different than in females because A. in males, meiosis begins before birth and stops until puberty B. in males, meiosis II occurs before meiosis I C. in males, there is equal distribution of cytoplasm into four cells D. in males, there is unequal distribution of cytop ...
Meiotic cell division and Sexual Reprodution
... Meiosis as a Source of Variation • RECOMBINATION - Each sperm and egg contain a unique combination of genetic instructions due to meiosis • At fertilization the full species number of chromosomes is restored. • This unique combination of thousands of genes at fertilization produces an offspring tha ...
... Meiosis as a Source of Variation • RECOMBINATION - Each sperm and egg contain a unique combination of genetic instructions due to meiosis • At fertilization the full species number of chromosomes is restored. • This unique combination of thousands of genes at fertilization produces an offspring tha ...
Meiosis - Grant County Schools
... different number of chromosomes • The chromosome numbers of a species is not related to the complexity of the organism ...
... different number of chromosomes • The chromosome numbers of a species is not related to the complexity of the organism ...
Revision Notes for Chapter 8 – Variety within a Species
... Body cells have two matching sets of chromosomes. Gametes produced during meiosis have one set of chromosomes (half the number of a normal body cell). Matching chromosomes pair and separate during the production of gametes The random assortment of chromosomes during meiosis leads to variety in offsp ...
... Body cells have two matching sets of chromosomes. Gametes produced during meiosis have one set of chromosomes (half the number of a normal body cell). Matching chromosomes pair and separate during the production of gametes The random assortment of chromosomes during meiosis leads to variety in offsp ...
Civics – Unit 1 Jeopardy - Frontenac Secondary School
... It is when a fragment of one chromosome attaches to a non-homogolous chromosome (i.e., a different chromosome that is not part of the homogolous pair) ...
... It is when a fragment of one chromosome attaches to a non-homogolous chromosome (i.e., a different chromosome that is not part of the homogolous pair) ...
GENES AND CHROMOSOMES
... A. alleles carried on homologs (sketch these) 1. homologs segregate during meiosis 2. gametes carry one allele or the other, but not both B. when two pairs of alternate alleles carried on two pairs of homologs 1. homologs separate during meiosis I 2. chromatids separate during meiosis II 3. alleles ...
... A. alleles carried on homologs (sketch these) 1. homologs segregate during meiosis 2. gametes carry one allele or the other, but not both B. when two pairs of alternate alleles carried on two pairs of homologs 1. homologs separate during meiosis I 2. chromatids separate during meiosis II 3. alleles ...
Teacher notes and student sheets
... Some genetic diseases are caused by chromosome mutations where the distribution of the chromosomes is affected. One of the commonest chromosome mutations is called non-disjunction, and causes what is known as Down’s syndrome. Down’s syndrome occurs when, at a crucial stage in cell division, the chro ...
... Some genetic diseases are caused by chromosome mutations where the distribution of the chromosomes is affected. One of the commonest chromosome mutations is called non-disjunction, and causes what is known as Down’s syndrome. Down’s syndrome occurs when, at a crucial stage in cell division, the chro ...
Teacher notes and student sheets
... Some genetic diseases are caused by chromosome mutations where the distribution of the chromosomes is affected. One of the commonest chromosome mutations is called non-disjunction, and causes what is known as Down’s syndrome. Down’s syndrome occurs when, at a crucial stage in cell division, the chro ...
... Some genetic diseases are caused by chromosome mutations where the distribution of the chromosomes is affected. One of the commonest chromosome mutations is called non-disjunction, and causes what is known as Down’s syndrome. Down’s syndrome occurs when, at a crucial stage in cell division, the chro ...
Meiosis
... • When your BODY cells (autosomal) divide, they make exact copies • Results = two cells with the same type and number of chromosomes as the parent cell. • Many animals reproduce ASEXUALLY – through mitosis ex: flatworms, sponges, jellyfish ...
... • When your BODY cells (autosomal) divide, they make exact copies • Results = two cells with the same type and number of chromosomes as the parent cell. • Many animals reproduce ASEXUALLY – through mitosis ex: flatworms, sponges, jellyfish ...
BIOL 112 – Principles of Zoology
... 1. Polyploidy Usually lethal in mammals Does occur in some animals - Reproduction via parthenogenesis, Flatworms, leeches, brine shrimp, lizards, salamanders, salmonids Polyploidy in plants: much more common because it can be tolerated by plants, can reproduce asexually… Important role in the evolu ...
... 1. Polyploidy Usually lethal in mammals Does occur in some animals - Reproduction via parthenogenesis, Flatworms, leeches, brine shrimp, lizards, salamanders, salmonids Polyploidy in plants: much more common because it can be tolerated by plants, can reproduce asexually… Important role in the evolu ...
Exam 4 Review - Iowa State University
... 6.) Looking through a microscope at some dividing cells, you note that the chromosomes are visible and the stage most closely resemble that of the one labeled “A” in figure 1. What stage is it? A) metaphase B) prophase C) anaphase D) G1 E) interphase 7.) Asexual reproduction results in the productio ...
... 6.) Looking through a microscope at some dividing cells, you note that the chromosomes are visible and the stage most closely resemble that of the one labeled “A” in figure 1. What stage is it? A) metaphase B) prophase C) anaphase D) G1 E) interphase 7.) Asexual reproduction results in the productio ...
Amniocentisis - Berkeley MCB
... Nondisjunction in meiosis I or II results in gametes with an extra or missing chromosome. When these gametes fuse, the fusion results in zygotes with an extra or missing chromosome, a situation termed aneuploidy! What are the consequences of aneuploidy in humans? ...
... Nondisjunction in meiosis I or II results in gametes with an extra or missing chromosome. When these gametes fuse, the fusion results in zygotes with an extra or missing chromosome, a situation termed aneuploidy! What are the consequences of aneuploidy in humans? ...
Multiple Choice Questions – Answers
... cells. Mitotic division results in daughter cells containing a full number of genes as the parent cell they came from. 5. The type of cell division that occurs in the gamete cells is known as: A Cytosis B Meiosis [True] C Osmosis D Mitosis The correct answer is B. Meiosis is the cell division proces ...
... cells. Mitotic division results in daughter cells containing a full number of genes as the parent cell they came from. 5. The type of cell division that occurs in the gamete cells is known as: A Cytosis B Meiosis [True] C Osmosis D Mitosis The correct answer is B. Meiosis is the cell division proces ...
Week 6 Notes Probability and Heredity & The Cell and
... __SEPARATE__ and are distributed to __2__ different __CELLS__ b. __NORMAL__ cells have __4__ chromosomes, a __SEX__ cell has __2__ chromosomes c. __SEX__cells combine to form an __ORGANISM__ each sex __CELL__ contributes __HALF__ the normal number of __CHROMOSOMES__. d. The __OFFSPRING__ gets the __ ...
... __SEPARATE__ and are distributed to __2__ different __CELLS__ b. __NORMAL__ cells have __4__ chromosomes, a __SEX__ cell has __2__ chromosomes c. __SEX__cells combine to form an __ORGANISM__ each sex __CELL__ contributes __HALF__ the normal number of __CHROMOSOMES__. d. The __OFFSPRING__ gets the __ ...
What are multiple alleles
... sample of genetic material is taken from a white blood cell. The chromosomes are isolated, organized in pairs, photographed and studied. They help couples understand their chances of having a child with a genetic disorder. ...
... sample of genetic material is taken from a white blood cell. The chromosomes are isolated, organized in pairs, photographed and studied. They help couples understand their chances of having a child with a genetic disorder. ...
Polyploid
Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes. Most species whose cells have nuclei (Eukaryotes) are diploid, meaning they have two sets of chromosomes—one set inherited from each parent. However, polyploidy is found in some organisms and is especially common in plants. In addition, polyploidy occurs in some tissues of animals that are otherwise diploid, such as human muscle tissues. This is known as endopolyploidy. Species whose cells do not have nuclei, that is, Prokaryotes, may be polyploid organisms, as seen in the large bacterium Epulopicium fishelsoni [1]. Hence ploidy is defined with respect to a cell. Most eukaryotes have diploid somatic cells, but produce haploid gametes (eggs and sperm) by meiosis. A monoploid has only one set of chromosomes, and the term is usually only applied to cells or organisms that are normally diploid. Male bees and other Hymenoptera, for example, are monoploid. Unlike animals, plants and multicellular algae have life cycles with two alternating multicellular generations. The gametophyte generation is haploid, and produces gametes by mitosis, the sporophyte generation is diploid and produces spores by meiosis.Polyploidy refers to a numerical change in a whole set of chromosomes. Organisms in which a particular chromosome, or chromosome segment, is under- or overrepresented are said to be aneuploid (from the Greek words meaning ""not"", ""good"", and ""fold""). Therefore the distinction between aneuploidy and polyploidy is that aneuploidy refers to a numerical change in part of the chromosome set, whereas polyploidy refers to a numerical change in the whole set of chromosomes.Polyploidy may occur due to abnormal cell division, either during mitosis, or commonly during metaphase I in meiosis.Polyploidy occurs in some animals, such as goldfish, salmon, and salamanders, but is especially common among ferns and flowering plants (see Hibiscus rosa-sinensis), including both wild and cultivated species. Wheat, for example, after millennia of hybridization and modification by humans, has strains that are diploid (two sets of chromosomes), tetraploid (four sets of chromosomes) with the common name of durum or macaroni wheat, and hexaploid (six sets of chromosomes) with the common name of bread wheat. Many agriculturally important plants of the genus Brassica are also tetraploids.Polyploidy can be induced in plants and cell cultures by some chemicals: the best known is colchicine, which can result in chromosome doubling, though its use may have other less obvious consequences as well. Oryzalin will also double the existing chromosome content.