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... Meiosis is a type of cell division known as a reduction division. Produces gametes (Sex cells such as sperm, egg, pollen and plant egg cells) Produces 4 haploid (n) cells from one parent diploid (2n) cell. o This is important as fusion of gametes nuclei at fertilization will need to result in a dipl ...
Recombinant DNA Answer Key
Recombinant DNA Answer Key

... ▶ The numerous breeds of dogs and varieties of crop plants and domestic animals are examples of selective breeding. Hybridization crosses dissimilar individuals to bring together the best of both parents in the offspring. Inbreeding is the continued breeding of individuals with selected characterist ...
Slide 1 - Eweb.furman.edu
Slide 1 - Eweb.furman.edu

... 2. chromosome: condensed strand of chromatin 3. “Ploidy” refers to the “information content” in the cell… how many ‘sets’ of chromosomes are there? - In eukaryotes, gametes and spores are haploid (typically) - bacteria and archaeans have one circular chromosome and so are haploid organisms that do N ...
The nucleotide sequence of Saccharomyces cerevisiae
The nucleotide sequence of Saccharomyces cerevisiae

... 1,250,000) which makes up half of chromosome IV has several distinctive features. First, as with most of the chromosomes, it has more or less regularly spaced regions rich in G+C, but its central domain has a lower G+C content. Second, this central domain contains all of the Ty and most of the LTR e ...
File - Intervention
File - Intervention

... What are mutations?  A mutation is a change to the structure or organization of DNA. o A gene mutation involves a change to a single gene. o A chromosomal mutation involves changes to the structure or organization of a chromosome.  Some mutations have little or no effect on an organism, while othe ...
7D Grade Descriptors File
7D Grade Descriptors File

... Identify similarities and differences between organisms of the same species e.g. Poodle and Alsatian Classify organisms into plants and animals Recognize that a vertebrate has a backbone and an invertebrate does not. Recognize that animals are not just mammals. Level 4 Recognize that invertebrates a ...
View full program
View full program

... invalidation  of  G15,  a  gene  involved  in  meiosis  regulation.   Meiosis  is  a  universal  process  used  by  all  eukaryote;  thesetwo  rounds  of  cellular  division  preceded  by   a  single  DNA  replication  produce  haploid  g ...
Science League Biology I Exam January 2014 Choose the answer
Science League Biology I Exam January 2014 Choose the answer

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Genetics Unit Syllabus 2016
Genetics Unit Syllabus 2016

... dependent on the transfer of genetic information and that this transfer happens in a predictable fashion that leads to genetic expression, (2) of the mechanism of cell division for somatic (mitosis) and sex cells (meiosis), and (3) of the structure and function of DNA & RNA to create proteins.  GEN ...
11.1 Mendel and the Garden Pea 11.1 Mendel and the
11.1 Mendel and the Garden Pea 11.1 Mendel and the

... #23 pair are the sex chromosomes females are designated XX while males are designated XY the genes on the Y chromosome determine “maleness” Sometimes er rors occur during meiosis Nondisjunction: failure of chromosome to separate during meiosis I or meiosis II leads to aneuploidy: abnl chromosome # m ...
OB35
OB35

... understand that humans have inheritable and noninheritable characteristics, and that inheritable characteristics are controlled by genes OB36 recall that genes are located on chromosomes and that in a human there are 23 pairs of chromosomes, which are located in the nucleus OB37 recall that chromoso ...
CHAPTER 5: Mendelian Genetics TB Ch. 11, p. 263
CHAPTER 5: Mendelian Genetics TB Ch. 11, p. 263

... Mendel was curious about the apparent "disapearance" of certain traits  in hybrid plants, so he continued his experiments. ...
14 – Mendel and the Gene Idea
14 – Mendel and the Gene Idea

... Maternal and paternal chromosomes mix up in different combinations during gamete formation (ANAPHASE I) AaBb X AaBb = 9:3:3:1 phenotypic ratio 9 = dominant trait 1/dominant trait 2 3 = dominant trait 1/recessive trait 2 3 = recessive trait 1/dominant trait 2 1 = recessive trait 1/recessive trait 2 ...
Meiosis pre test
Meiosis pre test

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this poster
this poster

... size of maize. Barley has two Ago4-like genes Ago1002 and Ago1003, of which Ago1002 shows a higher homology to Ago104. The comparative expression data of the barley Ago4-like gene will be presented. Mutations in the Ago1002 and Ago1003 genes are also being identified using a TILLING population. A co ...
Formation of New Species
Formation of New Species

... Species' appearance can be misleading in suggesting an ability or inability to mate. For example, even ...
Unit 4 Review
Unit 4 Review

... a. the allele for tall plants is recessive. b. the allele for short plants is dominant. c. the allele for tall plants is dominant. d. they were true-breeding like their parents. ____ 8. The principles of probability can be used to a. predict the traits of the offspring produced by genetic crosses. b ...
How was DNA shown to be the genetic material?
How was DNA shown to be the genetic material?

... wrinkled. 'A' and 'B' are dominant to 'a' and 'b' respectively. In the F1 generation all of the progeny are dark and smooth. F2 punnet square Two of the double heterozygotes (AaBb) are crossed to one another. Analysis of the offspring indicated that the traits carried by the 'grandparents' have not ...
Things to know for the Final - Mercer Island School District
Things to know for the Final - Mercer Island School District

... Be able to calculate the number of chromosomes in body cells if given the number of chromosomes in a sperm or egg cell (or vice versa). Know that where n represents the haploid number of chromosomes, the diploid number is 2n. Be able to compare and contrast mitosis with meiosis. Be able to explain ...
Genome - Faperta UGM
Genome - Faperta UGM

... It has only 2 x 5 chromosomes It is just 70 Mbp It has a life cycle of only 6 weeks A model plant for the investigation of plant function Contains 25,498 structural genes from 11,000 families The structural genes are present in only few copies sometimes just one protein Structural genes encoding for ...
Mendel Review ppt
Mendel Review ppt

... What was Mendel’s next step? He crossed two F1 plants. What results did he get? The F2 generation What interesting ratio did he find? They were 3:1 (dominant to recessive) ...
Genetics/Genetic Disorders, Evolution
Genetics/Genetic Disorders, Evolution

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GENETICS TEST
GENETICS TEST

... 15. The mathematical chance that an event will occur is called _______________. 16. Chromosome pairs that contain similar information are called _______________. 17. The cell that forms when the egg and the sperm combine is called a _______________. 18. This picture allows scientists to view human c ...
Name: _ Per: ______ Date: Chapter 14 Test Review Describe how
Name: _ Per: ______ Date: Chapter 14 Test Review Describe how

... 11. Determine as the genotypes of as many of the individuals as possible. The shaded trait is an xlinked dominant trait. ...
Genetics Test
Genetics Test

... 12. In a gerbil population, the gene for coarse hair (H) is dominant, while the gene for smooth hair (h) is recessive. One pet store found that most of their customers want coarse­haired gerbils. Which cross between male and female gerbils will produce the greatest number of coarse­haired offspring? ...
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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.
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