Biology-1 Exam Three There are a total of 68 questions on this exam
... 60. The mitotic spindle is composed of microtubules and is formed during prophase of mitosis. (T/F) 61. The formation of a cleavage furrow during cytokinesis suggests that mitosis is occurring in animal cells. (T/F) 62. During meiosis, DNA is duplicated twice. (T/F) 63. Trisomy 21 causes the conditi ...
... 60. The mitotic spindle is composed of microtubules and is formed during prophase of mitosis. (T/F) 61. The formation of a cleavage furrow during cytokinesis suggests that mitosis is occurring in animal cells. (T/F) 62. During meiosis, DNA is duplicated twice. (T/F) 63. Trisomy 21 causes the conditi ...
Science Hand Out 6 - Literacy Action Network
... In all organisms, the instructions for specifying the characteristics of the organisms are carried in DNA. Most of the cells in a human contain two copies of each of 22 different chromosomes. In addition, there is a pair of chromosomes that determine sex. Changes in DNA (mutations) occur spontaneous ...
... In all organisms, the instructions for specifying the characteristics of the organisms are carried in DNA. Most of the cells in a human contain two copies of each of 22 different chromosomes. In addition, there is a pair of chromosomes that determine sex. Changes in DNA (mutations) occur spontaneous ...
Review for Quiz: Mitosis
... 11) Chemotherapy utilizes chemicals that disrupt various parts of the cell cycle, targeting rapidly growing cells. A drug called Taxol is one such drug that prevents the mitosis phase from taking place. a. Explain how drugs like Taxol are useful as cancer treatment. ...
... 11) Chemotherapy utilizes chemicals that disrupt various parts of the cell cycle, targeting rapidly growing cells. A drug called Taxol is one such drug that prevents the mitosis phase from taking place. a. Explain how drugs like Taxol are useful as cancer treatment. ...
Nature vs. Nurture - Elizabeth School District
... on average as different from one another as are pairs of children selected from the general ...
... on average as different from one another as are pairs of children selected from the general ...
3) Section 2 - Note Taking
... E. Dominant and Recessive Alleles 1. A dominant allele will mask the other allele for a particular trait. 2. Recessive alleles show when two copies of the recessive allele are inherited. 3. To show a dominant allele a person can have 1 or 2 alleles for the trait. D. Expression of Traits 1. The envir ...
... E. Dominant and Recessive Alleles 1. A dominant allele will mask the other allele for a particular trait. 2. Recessive alleles show when two copies of the recessive allele are inherited. 3. To show a dominant allele a person can have 1 or 2 alleles for the trait. D. Expression of Traits 1. The envir ...
Document
... species of the genus Rana differ in the time of their peak breeding activity. 3. Behavioral isolation: Species engage in distinct courtship and mating rituals. 4. Mechanical isolation: Interbreeding is prevented by structural or molecular blockage of the formation of the zygote. Mechanisms include t ...
... species of the genus Rana differ in the time of their peak breeding activity. 3. Behavioral isolation: Species engage in distinct courtship and mating rituals. 4. Mechanical isolation: Interbreeding is prevented by structural or molecular blockage of the formation of the zygote. Mechanisms include t ...
Macroevolution or - the evolution of species The Biological Species
... tetraploid. It cannot backcross with parents, but is fertile with a like type. ...
... tetraploid. It cannot backcross with parents, but is fertile with a like type. ...
Cell Reproduction & Mitosis
... chromosomes is essential for normal development and function 2. Humans missing one chromosome typically do not survive ...
... chromosomes is essential for normal development and function 2. Humans missing one chromosome typically do not survive ...
Exam 3 Material Outline MS Word
... - Turner syndrome = XO (only 45 chromosomes instead of 46); female hormone deficiencies at puberty; can be t - Trisomy = XXX; most have no detectable defects; still fertile 3. Mistakes in cell division can lead to new species. Polyploidy – when one or more entire sets of chromosomes have been added ...
... - Turner syndrome = XO (only 45 chromosomes instead of 46); female hormone deficiencies at puberty; can be t - Trisomy = XXX; most have no detectable defects; still fertile 3. Mistakes in cell division can lead to new species. Polyploidy – when one or more entire sets of chromosomes have been added ...
SEX and FERTILISATION
... (iv) The expected ratio of grey flies to black flies in the F2 is 3:1. Suggest why the observed ratio was different from the expected ratio. (b) In a study of variation, a group of students collected information on the heights and blood groups of a class. For each variation state whether it is conti ...
... (iv) The expected ratio of grey flies to black flies in the F2 is 3:1. Suggest why the observed ratio was different from the expected ratio. (b) In a study of variation, a group of students collected information on the heights and blood groups of a class. For each variation state whether it is conti ...
Patterns of Inheretance and Chromosomes chapt12 and chapt13
... - each trait is controlled by a single gene - each gene has only 2 alleles - there is a clear dominant-recessive relationship between the alleles ...
... - each trait is controlled by a single gene - each gene has only 2 alleles - there is a clear dominant-recessive relationship between the alleles ...
Mutations
... single gene i. Substitution ii. Frameshift a) Chromosomal mutations – most drastic, change in structure or # of chromosomes (affects many genes) ...
... single gene i. Substitution ii. Frameshift a) Chromosomal mutations – most drastic, change in structure or # of chromosomes (affects many genes) ...
Cure/Treatment
... • recessive genetic disorder • inability to repair damage caused by UV light • in extreme cases, all exposure to sunlight must be forbidden, no matter how small • individuals with the disease are often referred to as Children of the Night • suffer from basal cell carcinomas and other skin malignanci ...
... • recessive genetic disorder • inability to repair damage caused by UV light • in extreme cases, all exposure to sunlight must be forbidden, no matter how small • individuals with the disease are often referred to as Children of the Night • suffer from basal cell carcinomas and other skin malignanci ...
Chapter 4
... are exact copies of each other (so that when the cell divides, each new cell gets a copy). Centromere: The point at which the two sister chromatids are held together. ...
... are exact copies of each other (so that when the cell divides, each new cell gets a copy). Centromere: The point at which the two sister chromatids are held together. ...
BIOL Unit 5
... • 2N = diploid, which means, two sets. A cell that contains two sets of homologous chromosomes is called diploid. • 1N = haploid, which means, one set. A cell that contains a single set of genes is called haploid. • In animals, every cell in the body is diploid EXCEPT gametes. Gametes are haploid. • ...
... • 2N = diploid, which means, two sets. A cell that contains two sets of homologous chromosomes is called diploid. • 1N = haploid, which means, one set. A cell that contains a single set of genes is called haploid. • In animals, every cell in the body is diploid EXCEPT gametes. Gametes are haploid. • ...
What are chromosomes?
... 1a and 1b In most cases the breakpoint in the abl gene occurs in the 5¢ part of abl exon a1/2 within the segment between exons 1a and 1b Abl exons a2 to a11:are transposed into a region of the bcr gene between exons 12 and 16 (also referred to as b1 to b5) on chromosome 22 creating a bcr-abl fusio ...
... 1a and 1b In most cases the breakpoint in the abl gene occurs in the 5¢ part of abl exon a1/2 within the segment between exons 1a and 1b Abl exons a2 to a11:are transposed into a region of the bcr gene between exons 12 and 16 (also referred to as b1 to b5) on chromosome 22 creating a bcr-abl fusio ...
Document
... Gregor Mendel • It was not until the mid-nineteenth century that Gregor Mendel, an Austrian monk, carried out important studies of heredity— the passing on of characteristics from parents to offspring. • Characteristics that are inherited are called traits. ...
... Gregor Mendel • It was not until the mid-nineteenth century that Gregor Mendel, an Austrian monk, carried out important studies of heredity— the passing on of characteristics from parents to offspring. • Characteristics that are inherited are called traits. ...
EOC PRACTICE QUESTIONS #2
... 109. Genetic disorder characterized by abnormal shape of red blood cell that make them unable to carry oxygen is ______. People who are heterozygous are immune to the mosquito carrying disease called ______________. ...
... 109. Genetic disorder characterized by abnormal shape of red blood cell that make them unable to carry oxygen is ______. People who are heterozygous are immune to the mosquito carrying disease called ______________. ...
Allele Tracking
... pair a different color. Make sure you do not start with a pair of chromosomes that are the same length and color (we'll get to these in a minute). For this exercise we will use the following convention: a. Same size and same color = Identical chromosomes b. Same size and different color = homologous ...
... pair a different color. Make sure you do not start with a pair of chromosomes that are the same length and color (we'll get to these in a minute). For this exercise we will use the following convention: a. Same size and same color = Identical chromosomes b. Same size and different color = homologous ...
p. synthesis
... IV. Variation in Populations C. Genetic Sources of Variation 2. Non-random Mating 3. Fecundity selection/ Mortality selection Some organisms with certain traits reproduce more or survive better to reproductive age than others. What can increase variation in a population? 1. Migration (Gene Flow)- m ...
... IV. Variation in Populations C. Genetic Sources of Variation 2. Non-random Mating 3. Fecundity selection/ Mortality selection Some organisms with certain traits reproduce more or survive better to reproductive age than others. What can increase variation in a population? 1. Migration (Gene Flow)- m ...
File
... and subsequently evolved into a number of different species. This was a time of considerable environmental change. The Southern Alps were beginning to form, and the world was entering a new ice age. This meant that a new alpine environment was available for colonisation. During glaciations, New Zeal ...
... and subsequently evolved into a number of different species. This was a time of considerable environmental change. The Southern Alps were beginning to form, and the world was entering a new ice age. This meant that a new alpine environment was available for colonisation. During glaciations, New Zeal ...
Entrance Examination Test Example
... C. Eating raw fish D. Eating poorly cooked pork E. Eating poorly cooked beef ...
... C. Eating raw fish D. Eating poorly cooked pork E. Eating poorly cooked beef ...
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.