Name - PSUSDscienceresources
... 21. Meiosis and mitosis are the two major types of cell division in organisms that reproduce sexually. Which of the following is a major difference between meiosis and mitosis? A meiosis results in half the number of cells, mitosis results in double the number of cells B meiosis occurs in prokaryot ...
... 21. Meiosis and mitosis are the two major types of cell division in organisms that reproduce sexually. Which of the following is a major difference between meiosis and mitosis? A meiosis results in half the number of cells, mitosis results in double the number of cells B meiosis occurs in prokaryot ...
Meiosis Lab Analysis
... 2.) What type of cell do we start with in the process, haploid or diploid? 3.) What does haploid mean? 4.) What does diploid mean? 5.) How many chromosomes does a human cell start with during the process of meiosis? 6.) What is found inside the two new cells after meiosis I? 7.) What is found in the ...
... 2.) What type of cell do we start with in the process, haploid or diploid? 3.) What does haploid mean? 4.) What does diploid mean? 5.) How many chromosomes does a human cell start with during the process of meiosis? 6.) What is found inside the two new cells after meiosis I? 7.) What is found in the ...
reading quiz: ch. 13.3-13.4
... 4. What is the order of events that occur during MEIOSIS I? a) prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis b) prophase I, prometaphase I, metaphase I, anaphase I, telophase I c) prophase I, metaphase I, anaphase I, telophase I, cytokinesis d) none of the above e) al ...
... 4. What is the order of events that occur during MEIOSIS I? a) prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis b) prophase I, prometaphase I, metaphase I, anaphase I, telophase I c) prophase I, metaphase I, anaphase I, telophase I, cytokinesis d) none of the above e) al ...
Unit 3 - kehsscience.org
... 2. Crossing Over – This occurs when the chromosome pairs first line up next to each other at the start of meiosis……some of the chromosomes “swap parts”, creating new combinations of genes 3. Mutations – it is possible for random mutations to occur during DNA replication that precedes meiosis; these ...
... 2. Crossing Over – This occurs when the chromosome pairs first line up next to each other at the start of meiosis……some of the chromosomes “swap parts”, creating new combinations of genes 3. Mutations – it is possible for random mutations to occur during DNA replication that precedes meiosis; these ...
Document
... You should be familiar with: The stages of the cell cycle The physical appearance of cells at each stage in the cell cycle The major events that occur during each stage in the cell cycle How daughter cells compare to parent cells after cell division occurs The reasons why cell division occ ...
... You should be familiar with: The stages of the cell cycle The physical appearance of cells at each stage in the cell cycle The major events that occur during each stage in the cell cycle How daughter cells compare to parent cells after cell division occurs The reasons why cell division occ ...
Syllabus
... or Cell Biology course. These include Molecular Biology of the Cell, Alberts et al, 5th edition, Chapters 4, 5 or Genetics: From Genes to Genomes, Hartwell et al, 3rd edition, Chapters 4, 13, 14, 18, 20. The 4th edition of Alberts is also available on line at pub med. You can search the text using t ...
... or Cell Biology course. These include Molecular Biology of the Cell, Alberts et al, 5th edition, Chapters 4, 5 or Genetics: From Genes to Genomes, Hartwell et al, 3rd edition, Chapters 4, 13, 14, 18, 20. The 4th edition of Alberts is also available on line at pub med. You can search the text using t ...
SEG exam 2 1
... a. production of enzymes that break the phosphate backbone. b. UV light. c. X-rays. d. presence of an extra X chromosome in the sperm or egg. e. duplication of multiple three-nucleotide repeats. ...
... a. production of enzymes that break the phosphate backbone. b. UV light. c. X-rays. d. presence of an extra X chromosome in the sperm or egg. e. duplication of multiple three-nucleotide repeats. ...
Heredity and the Environment
... – Zygote: following initial cell division of the fertilized egg • Mitosis—Exact replication of 22 non-sex linked chromosomes (autosomes) • Meiosis—When sex cells (egg & sperm) replicate, genetic material is shuffled and each chromosome has 23 single stranded chromosomes; when sperm and egg unite, th ...
... – Zygote: following initial cell division of the fertilized egg • Mitosis—Exact replication of 22 non-sex linked chromosomes (autosomes) • Meiosis—When sex cells (egg & sperm) replicate, genetic material is shuffled and each chromosome has 23 single stranded chromosomes; when sperm and egg unite, th ...
Lecture 8 – PDF
... application of opposite, sex-specific hormones at the appropriate developmental window (after which sex appears to be irreversibly determined) (a) monosex culture in many aquacultured fish species has several advantages ...
... application of opposite, sex-specific hormones at the appropriate developmental window (after which sex appears to be irreversibly determined) (a) monosex culture in many aquacultured fish species has several advantages ...
Practice EOC Questions
... A. It maintains the same exact DNA from one generation to the next. B. It helps to increase genetic variation. C. It promotes more interaction between males and females of the same species. D. It helps maintain the chromosome number of the species. The correct answer is… B ...
... A. It maintains the same exact DNA from one generation to the next. B. It helps to increase genetic variation. C. It promotes more interaction between males and females of the same species. D. It helps maintain the chromosome number of the species. The correct answer is… B ...
From the Department of Zoology, University of
... but appears .to have a more complex organization. While the exact number of these units per chromosome has not been determined yet, there is evidence that it may not be the same in all species (9, 10). For some time now the nature of the longitudinal differentiation of chromosomes into chromomeres, ...
... but appears .to have a more complex organization. While the exact number of these units per chromosome has not been determined yet, there is evidence that it may not be the same in all species (9, 10). For some time now the nature of the longitudinal differentiation of chromosomes into chromomeres, ...
Document
... mother and Y from father – Females carry XX chromosomes - X from mother and X from father ...
... mother and Y from father – Females carry XX chromosomes - X from mother and X from father ...
Lab 1
... Testis and Ovary) sig. _____ (We do not have slides of testis or ovaries so just study the diagrams.) ...
... Testis and Ovary) sig. _____ (We do not have slides of testis or ovaries so just study the diagrams.) ...
BINF 730 Biological Sequence Analysis Lecture 1 Biological
... • initiation factors – proteins that catayze the start of ...
... • initiation factors – proteins that catayze the start of ...
Bio290-08-Week 9
... • More common in plants • Correlation between the number of chromosome sets and size of organism • Autopolyploids: multiple chromosomes from one species • Allopolyploids: sets of chromosomes from two or more different species ...
... • More common in plants • Correlation between the number of chromosome sets and size of organism • Autopolyploids: multiple chromosomes from one species • Allopolyploids: sets of chromosomes from two or more different species ...
Review! Part 3 Cell cycle Order of events in cell growth and division
... Number of chromosomes are reduced by half = n o diploid full amount when two gametes are fused together = 2n Sexual vs. asexual reproduction o Asexual One parent/ one set of DNA Offspring are genetically identical Results in a clone o Sexual 2 parent offspring each parent will pass hal ...
... Number of chromosomes are reduced by half = n o diploid full amount when two gametes are fused together = 2n Sexual vs. asexual reproduction o Asexual One parent/ one set of DNA Offspring are genetically identical Results in a clone o Sexual 2 parent offspring each parent will pass hal ...
Document
... A. In humans XX is female and XY is male 1. The SRY gene has been shown to trigger the development into a male fetus at about 2 months old. 2. SRY probably regulates other genes 3. Some XX male and XY females exist with mutated SRY genes ...
... A. In humans XX is female and XY is male 1. The SRY gene has been shown to trigger the development into a male fetus at about 2 months old. 2. SRY probably regulates other genes 3. Some XX male and XY females exist with mutated SRY genes ...
The Cell Cycle and Cancer
... • two cells are formed from one cell • new cells are similar to old cell • the new cells replace old cells • root cells, skin cells, muscle cells are examples ...
... • two cells are formed from one cell • new cells are similar to old cell • the new cells replace old cells • root cells, skin cells, muscle cells are examples ...
The Big Picture: A Review of Biology
... Division of a cell into 2 identical cells Before mitosis: Chromosomes have copied themselves Sister chromatids: original chromosome and its exact copy are attached to each other Phases of mitosis o 1. Prophase: Nuclear membrane falls apart and spindle fibers start to form o 2. Metaphase: Sis ...
... Division of a cell into 2 identical cells Before mitosis: Chromosomes have copied themselves Sister chromatids: original chromosome and its exact copy are attached to each other Phases of mitosis o 1. Prophase: Nuclear membrane falls apart and spindle fibers start to form o 2. Metaphase: Sis ...
The Big Picture
... Division of a cell into 2 identical cells Before mitosis: Chromosomes have copied themselves Sister chromatids: original chromosome and its exact copy are attached to each other Phases of mitosis o 1. Prophase: Nuclear membrane falls apart and spindle fibers start to form o 2. Metaphase: Sis ...
... Division of a cell into 2 identical cells Before mitosis: Chromosomes have copied themselves Sister chromatids: original chromosome and its exact copy are attached to each other Phases of mitosis o 1. Prophase: Nuclear membrane falls apart and spindle fibers start to form o 2. Metaphase: Sis ...
LP 6 Chromosome abnormalities
... and impaired speech. Both of these disorders can be caused by UPD or other errors in imprinting involving genes on the long arm of chromosome 15. Other conditions, such as Beckwith-Wiedemann syndrome (a disorder characterized by accelerated growth and an increased risk of cancerous tumors), are asso ...
... and impaired speech. Both of these disorders can be caused by UPD or other errors in imprinting involving genes on the long arm of chromosome 15. Other conditions, such as Beckwith-Wiedemann syndrome (a disorder characterized by accelerated growth and an increased risk of cancerous tumors), are asso ...
p. synthesis
... 1. gene pool - all the genes in a population 2. allele frequency - % occurrence of a specific allele in a population 3. phenotype frequency - % occurrence of an individual in a population with a trait 4. genotype frequency - % occurrence of individuals in a population with a specific ...
... 1. gene pool - all the genes in a population 2. allele frequency - % occurrence of a specific allele in a population 3. phenotype frequency - % occurrence of an individual in a population with a trait 4. genotype frequency - % occurrence of individuals in a population with a specific ...
Complementation - Arkansas State University
... – male in appearance, but some feminization; sterile. – slow to learn, but not retarded. ...
... – male in appearance, but some feminization; sterile. – slow to learn, but not retarded. ...
Chromosome
A chromosome (chromo- + -some) is a packaged and organized structure containing most of the DNA of a living organism. It is not usually found on its own, but rather is complexed with many structural proteins called histones as well as associated transcription (copying of genetic sequences) factors and several other macromolecules. Two ""sister"" chromatids (half a chromosome) join together at a protein junction called a centromere. Chromosomes are normally visible under a light microscope only when the cell is undergoing mitosis. Even then, the full chromosome containing both joined sister chromatids becomes visible only during a sequence of mitosis known as metaphase (when chromosomes align together, attached to the mitotic spindle and prepare to divide). This DNA and its associated proteins and macromolecules is collectively known as chromatin, which is further packaged along with its associated molecules into a discrete structure called a nucleosome. Chromatin is present in most cells, with a few exceptions - erythrocytes for example. Occurring only in the nucleus of eukaryotic cells, chromatin composes the vast majority of all DNA, except for a small amount inherited maternally which is found in mitochondria. In prokaryotic cells, chromatin occurs free-floating in cytoplasm, as these cells lack organelles and a defined nucleus. The main information-carrying macromolecule is a single piece of coiled double-stranded DNA, containing many genes, regulatory elements and other noncoding DNA. The DNA-bound macromolecules are proteins, which serve to package the DNA and control its functions. Chromosomes vary widely between different organisms. Some species such as certain bacteria also contain plasmids or other extrachromosomal DNA. These are circular structures in the cytoplasm which contain cellular DNA and play a role in horizontal gene transfer.Compaction of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. Chromosomal recombination during meiosis and subsequent sexual reproduction plays a vital role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe and die, or it may unexpectedly evade apoptosis leading to the progression of cancer.In prokaryotes (see nucleoids) and viruses, the DNA is often densely packed and organized. In the case of archaea by homologs to eukaryotic histones, in the case of bacteria by histone-like proteins. Small circular genomes called plasmids are often found in bacteria and also in mitochondria and chloroplasts, reflecting their bacterial origins.