Unit 5 - Perry Local Schools
... • Organs - groups of tissues that perform a specific or similar function. • Organ systems - groups of organs that carry out similar functions. • Cells Tissues Organs Organ Systems CELL ...
... • Organs - groups of tissues that perform a specific or similar function. • Organ systems - groups of organs that carry out similar functions. • Cells Tissues Organs Organ Systems CELL ...
The Cell Cycle - Fair Lawn Schools
... Mitosis ensures that each new cell receives a copy of each chromosome. – See mitosis handout for the stages of mitosis. ...
... Mitosis ensures that each new cell receives a copy of each chromosome. – See mitosis handout for the stages of mitosis. ...
Plant Reproduction
... • Sexual reproduction requires fusion of male cells in the pollen grain with female cells in the ovule. • List some advantages and drawbacks to sexual reproduction. ...
... • Sexual reproduction requires fusion of male cells in the pollen grain with female cells in the ovule. • List some advantages and drawbacks to sexual reproduction. ...
Reproduction Review
... b) How many chromosomes does a normal parent cell have in meiosis? c) The two stages of meiosis are the ________________ stage and ________________ stage. d) During the first stage of meiosis, what happens to the number of chromosomes? e) In the first stage, do chromosomes line up in homologous pair ...
... b) How many chromosomes does a normal parent cell have in meiosis? c) The two stages of meiosis are the ________________ stage and ________________ stage. d) During the first stage of meiosis, what happens to the number of chromosomes? e) In the first stage, do chromosomes line up in homologous pair ...
Asexual Reprodction
... the end of cell division This is the time for cell growth and activity This stage can be extended if environmental factors are not favorable ...
... the end of cell division This is the time for cell growth and activity This stage can be extended if environmental factors are not favorable ...
Notes: Chromosomes and Meiosis Gametes have half the number of
... • Fertilization between egg and sperm occurs in sexual reproduction. • Diploid (2n) cells have two copies of every chromosome. – Each comes from each parent ...
... • Fertilization between egg and sperm occurs in sexual reproduction. • Diploid (2n) cells have two copies of every chromosome. – Each comes from each parent ...
Genetics Cell Division
... G1 phase (first gap) growth of cell, enough cytosol for 2 S (synthesis) DNA replication, DNA in chromatin G2 phase (second gap) chromosome condensation microtubule synthesis ...
... G1 phase (first gap) growth of cell, enough cytosol for 2 S (synthesis) DNA replication, DNA in chromatin G2 phase (second gap) chromosome condensation microtubule synthesis ...
Mitosis and Cell Division
... look like at the end of meiosis? • How much are you ‘like’ your mom and dad? • Do ‘mother’ chromosomes have to stay together? ...
... look like at the end of meiosis? • How much are you ‘like’ your mom and dad? • Do ‘mother’ chromosomes have to stay together? ...
1902: Sutton (American) and Boveri (German) Mendel`s genes
... Reduce the number of chromosomes present in each gamete so that sexual reproduction does not lead to an increase in the # of chromosomes Meiosis allows for independent assortment of alleles (Mixes up the genes) to create a genetically distinct individual. Genetic diversity allows for adaptation ...
... Reduce the number of chromosomes present in each gamete so that sexual reproduction does not lead to an increase in the # of chromosomes Meiosis allows for independent assortment of alleles (Mixes up the genes) to create a genetically distinct individual. Genetic diversity allows for adaptation ...
Name
... a. meiosis produces four genetically different haploid cells b. meiosis produces four genetically different diploid cells c. meiosis produces two genetically different haploid cells d. meiosis produces two genetically different diploid cells 2. The purpose of meiosis is to produce _________________ ...
... a. meiosis produces four genetically different haploid cells b. meiosis produces four genetically different diploid cells c. meiosis produces two genetically different haploid cells d. meiosis produces two genetically different diploid cells 2. The purpose of meiosis is to produce _________________ ...
File
... acts as a source of variations within a species. always produces genetic disorders. is called crossing. ...
... acts as a source of variations within a species. always produces genetic disorders. is called crossing. ...
Mitosis Name: Background Concepts *What organelle contains the
... *What organelle contains the genetic information in a cell? ...
... *What organelle contains the genetic information in a cell? ...
Meiosis I
... The haploid cells produced by meiosis II are gametes. In male animals, these gametes are called sperm. In some plants, pollen grains contain haploid sperm cells. In female animals, generally only one of the cells produced by meiosis is involved in reproduction. The female gamete is called an egg in ...
... The haploid cells produced by meiosis II are gametes. In male animals, these gametes are called sperm. In some plants, pollen grains contain haploid sperm cells. In female animals, generally only one of the cells produced by meiosis is involved in reproduction. The female gamete is called an egg in ...
Concept 9.2 The Cell Cycle Multiplies Cells
... where n=the haploid number of the cell. In humans n=23 so 223 = over 8 million!! ...
... where n=the haploid number of the cell. In humans n=23 so 223 = over 8 million!! ...
Gene rearrangements occur via various mechanisms
... chromosome being changed); or by the breaking and rejoining of DNA strands, which forms new molecules of DNA. Crossing-over (homologous recombination) is one such mechanism by which DNA variations can occur, and genes can be rearranged. Crossing-over is an event that occurs during meiosis when chrom ...
... chromosome being changed); or by the breaking and rejoining of DNA strands, which forms new molecules of DNA. Crossing-over (homologous recombination) is one such mechanism by which DNA variations can occur, and genes can be rearranged. Crossing-over is an event that occurs during meiosis when chrom ...
Unit 4 Mitosis, Meiosis and cell regulation
... Be able to relate what stem cells are and the differences between the types of cloning and the types of stem cells Be able to explain the lac operon and trp operon and their overall goal. Be able to explain the three post-transcriptional modifications of eukaryotic cells. Be able to explain the two ...
... Be able to relate what stem cells are and the differences between the types of cloning and the types of stem cells Be able to explain the lac operon and trp operon and their overall goal. Be able to explain the three post-transcriptional modifications of eukaryotic cells. Be able to explain the two ...
Slide 1
... same chromosome attached together • Centromere Is the primary constriction where the sister chromatids are attached ...
... same chromosome attached together • Centromere Is the primary constriction where the sister chromatids are attached ...
Mitosis notes 9.03
... anaphase draws to a close b. Actin filaments form a contractile ring; as the ring gets smaller, the cleavage furrow pinches the cell and form two daughter cells Plant mitosis, occurs primarily in meristematic tissue at tips of roots and stems and edge of trunk; has same stages as animal mitosis with ...
... anaphase draws to a close b. Actin filaments form a contractile ring; as the ring gets smaller, the cleavage furrow pinches the cell and form two daughter cells Plant mitosis, occurs primarily in meristematic tissue at tips of roots and stems and edge of trunk; has same stages as animal mitosis with ...
Final Exam Review Study the following terms and concepts to
... • What are the reactants? • What would happen if you removed any of the reactants? Chapter 9 9.1- Cellular Respiration • What is the purpose of it? • Equation for Respiration= • What are the products? • What are the reactants? • What would happen if you removed any of the reactants? • Why cellular r ...
... • What are the reactants? • What would happen if you removed any of the reactants? Chapter 9 9.1- Cellular Respiration • What is the purpose of it? • Equation for Respiration= • What are the products? • What are the reactants? • What would happen if you removed any of the reactants? • Why cellular r ...
OMM Reproduction
... mally have 10 pairs of chromosomes (a total of 20 chromosomes). When pollen grains (the male sex cells) or ovules (the female sex cells) are formed, each has only 10 single chromo somes. When fertilization takes place, the pollen grain contributes 10 chromosomes and the ovule contributes 10 chromos ...
... mally have 10 pairs of chromosomes (a total of 20 chromosomes). When pollen grains (the male sex cells) or ovules (the female sex cells) are formed, each has only 10 single chromo somes. When fertilization takes place, the pollen grain contributes 10 chromosomes and the ovule contributes 10 chromos ...
Cell Division and Reproduction
... Meiosis is a type of cell division that produces haploid gametes in diploid organisms 2 haploid gametes combine in fertilization to restore the diploid state in the zygote Meiosis and mitosis are preceded by the duplication of chromosomes, however Meiosis is followed by 2 consecutive cell di ...
... Meiosis is a type of cell division that produces haploid gametes in diploid organisms 2 haploid gametes combine in fertilization to restore the diploid state in the zygote Meiosis and mitosis are preceded by the duplication of chromosomes, however Meiosis is followed by 2 consecutive cell di ...
Chapter 12: The Cell Cycle
... 8.) Explain how the G1 checkpoint is subject to social control using the slides from lecture or book. What is acting as the “social control” in this? 9.) What characterizes cancer on a cellular level? 10.) If a cancer cell divides without growth factors, which checkpoint does it bypass? Explain why ...
... 8.) Explain how the G1 checkpoint is subject to social control using the slides from lecture or book. What is acting as the “social control” in this? 9.) What characterizes cancer on a cellular level? 10.) If a cancer cell divides without growth factors, which checkpoint does it bypass? Explain why ...
Meiosis
Meiosis /maɪˈoʊsɨs/ is a specialized type of cell division which reduces the chromosome number by half. This process occurs in all sexually reproducing single-celled and multi-celled eukaryotes, including animals, plants, and fungi. Errors in meiosis resulting in aneuploidy are the leading known cause of miscarriage and the most frequent genetic cause of developmental disabilities. In meiosis, DNA replication is followed by two rounds of cell division to produce four daughter cells each with half the number of chromosomes as the original parent cell. The two meiotic divisions are known as meiosis I and meiosis II. Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sister chromatids. In meiosis I, homologous chromosomes pair with each other and can exchange genetic material in a process called chromosomal crossover. The homologous chromosomes are then segregated into two new daughter cells, each containing half the number of chromosomes as the parent cell. At the end of meiosis I, sister chromatids remain attached and may differ from one another if crossing-over occurred. In meiosis II, the two cells produced during meiosis I divide again. Sister chromatids segregate from one another to produce four total daughter cells. These cells can mature into various types of gametes such as ova, sperm, spores, or pollen.Because the number of chromosomes is halved during meiosis, gametes can fuse (i.e. fertilization) to form a zygote with a complete chromosome count containing a combination of paternal and maternal chromosomes. Thus, meiosis and fertilization facilitate sexual reproduction with successive generations maintaining the same number of chromosomes. For example, a typical diploid human cell contains 23 pairs of chromosomes (46 total, half of maternal origin and half of paternal origin). Meiosis produces haploid gametes with one set of 23 chromosomes. When two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes. This same pattern, but not the same number of chromosomes, occurs in all organisms that utilize meiosis. Thus, if a species has 30 chromosomes in its somatic cells, it will produce gametes with 15 chromosomes.