Asexual vs Sexual Reproduction
... • Haploid cells are created through meiosis. • Meiosis is a sexual process. • We call haploid cells “1N” or “N” ...
... • Haploid cells are created through meiosis. • Meiosis is a sexual process. • We call haploid cells “1N” or “N” ...
Document
... b. Disjunction, synapsis, crossing over, random alignment. c. Random alignment, synapsis, disjunction, crossing over. d. Synapsis, crossing over, random alignment, disjunction. 11. Which name is given to the male germ cell? a. Primary spermatocyte. b. Secondary spermatocyte. c. Spermatagonium. d. Sp ...
... b. Disjunction, synapsis, crossing over, random alignment. c. Random alignment, synapsis, disjunction, crossing over. d. Synapsis, crossing over, random alignment, disjunction. 11. Which name is given to the male germ cell? a. Primary spermatocyte. b. Secondary spermatocyte. c. Spermatagonium. d. Sp ...
KEY - Humble ISD
... Name the Phase (Be Specific – for example: S phase of Interphase) – you may use answers more than once. ___S phase of Interphase___________________10. DNA replication occurs ___Telophase____________________________11. chromosomes uncoil into their tangled state of DNA and protein ___Prophase________ ...
... Name the Phase (Be Specific – for example: S phase of Interphase) – you may use answers more than once. ___S phase of Interphase___________________10. DNA replication occurs ___Telophase____________________________11. chromosomes uncoil into their tangled state of DNA and protein ___Prophase________ ...
MEIOTIC STAGES and Their EVENTS Stage
... of the cell. Spindle fibers are connected to each homologue’s centromere. Chiasma show where crossing over has occurred between homologous chromosomes_ ...
... of the cell. Spindle fibers are connected to each homologue’s centromere. Chiasma show where crossing over has occurred between homologous chromosomes_ ...
Chapter 13 Meiosis - Perry Local Schools
... • Each haploid cell grows by mitosis into a haploid multicellular organism. • The haploid adult produces gametes by mitosis. ...
... • Each haploid cell grows by mitosis into a haploid multicellular organism. • The haploid adult produces gametes by mitosis. ...
The diagram below shows two processes (A and B) involved in
... crossing over occurs, and during stage 2, chromosomes are randomly arranged in the middle of the cell and independent assortment occurs. ...
... crossing over occurs, and during stage 2, chromosomes are randomly arranged in the middle of the cell and independent assortment occurs. ...
Gamete_Cell_Division_teacher
... Interphase Period of growth and synthesis (replication/duplication) of DNA Preparing the nucleus and cytoplasm for division ...
... Interphase Period of growth and synthesis (replication/duplication) of DNA Preparing the nucleus and cytoplasm for division ...
Section 8-1 Chromosomes - walker2011
... The division of gametes 35. What type of cell undergoes meiosis? Gametes 36. Name the 2 human gametes & tell their chromosome number. Egg (or ovum) = 23 sperm = 23 37. What is the chromosome number for humans? 46 and 23 38. The fusion of a ______sperm_______ and an ______egg_______ produces a _____z ...
... The division of gametes 35. What type of cell undergoes meiosis? Gametes 36. Name the 2 human gametes & tell their chromosome number. Egg (or ovum) = 23 sperm = 23 37. What is the chromosome number for humans? 46 and 23 38. The fusion of a ______sperm_______ and an ______egg_______ produces a _____z ...
AP Biology
... attention to the following special steps. a. During prophase I, don’t forget to show crossing over. Remove a small, equal section of one chromatid from each color. Reattach these sections to their opposite, homologous chromatids (see picture to the right). b. During metaphase I be sure to line up ho ...
... attention to the following special steps. a. During prophase I, don’t forget to show crossing over. Remove a small, equal section of one chromatid from each color. Reattach these sections to their opposite, homologous chromatids (see picture to the right). b. During metaphase I be sure to line up ho ...
The Cell Cycle and Mitosis
... The answer is B. Metaphase is the short second phase of mitosis, during which the chromosomes begin to line up on the equator of the spindle. Centromere Sister chromatids ...
... The answer is B. Metaphase is the short second phase of mitosis, during which the chromosomes begin to line up on the equator of the spindle. Centromere Sister chromatids ...
8.4 - Meiosis L5
... Every diploid cell of an organism has 2 sets of chromosomes, one from each parent. During meiosis, the homologous pairs of chromosomes separate, so that only one chromosome from each parent enters each ...
... Every diploid cell of an organism has 2 sets of chromosomes, one from each parent. During meiosis, the homologous pairs of chromosomes separate, so that only one chromosome from each parent enters each ...
Untitled
... b) In an organism where gametes have 10 chromosomes, how many chromosomes would be present in the somatic cells of: a trisomic ...
... b) In an organism where gametes have 10 chromosomes, how many chromosomes would be present in the somatic cells of: a trisomic ...
DNA - St. John Paul II Collegiate
... 23 chromosomes, and human egg cells contain 23 chromosomes. When the two gametes unite, a zygote is formed with 46 chromosomes. The final result of meiosis is that the gametes have only half the original number of chromosomes as the parent cell. ...
... 23 chromosomes, and human egg cells contain 23 chromosomes. When the two gametes unite, a zygote is formed with 46 chromosomes. The final result of meiosis is that the gametes have only half the original number of chromosomes as the parent cell. ...
Chapter 4 • Lesson 23
... Recall that asexual reproduction is the production of offspring by a single parent. Some eukaryotes reproduce asexually by mitosis. Yeasts and freshwater animals called hydras reproduce in this way. Their offspring develop from buds on the parent's body. By contrast, meiosis is used to make gametes, ...
... Recall that asexual reproduction is the production of offspring by a single parent. Some eukaryotes reproduce asexually by mitosis. Yeasts and freshwater animals called hydras reproduce in this way. Their offspring develop from buds on the parent's body. By contrast, meiosis is used to make gametes, ...
Mitosis and Meiosis Powerpoint presentation
... skin and hair, reproduce asexually by splitting and dividing through MITOSIS • Mitosis is used when cells/tissues need to grow and repair • Mitosis creates clones of the parent cell ...
... skin and hair, reproduce asexually by splitting and dividing through MITOSIS • Mitosis is used when cells/tissues need to grow and repair • Mitosis creates clones of the parent cell ...
Mitosis and meiosis are similar processes in that they both result in
... There are two major differences between mitosis and meiosis. First, meiosis involves not one, but two cell divisions. Second, meiosis leads to the production of germ cells, which are cells that give rise to gametes. Germ cells are different from somatic cells in a critical way. Whereas somatic cells ...
... There are two major differences between mitosis and meiosis. First, meiosis involves not one, but two cell divisions. Second, meiosis leads to the production of germ cells, which are cells that give rise to gametes. Germ cells are different from somatic cells in a critical way. Whereas somatic cells ...
3. Cells (Parts and functions, Processes) Cells are the building
... Prophase - chromosomes condense and form sister chromatids Metaphase-chromosomes line up in the middle of cell; sister chromatids straddle metaphase plate in middle of cell Anaphase- Paired centromeres of each chromosome separate and the individual sister chromatids move to opposite poles. ...
... Prophase - chromosomes condense and form sister chromatids Metaphase-chromosomes line up in the middle of cell; sister chromatids straddle metaphase plate in middle of cell Anaphase- Paired centromeres of each chromosome separate and the individual sister chromatids move to opposite poles. ...
Meiosis PowerPoint
... 1. Synapsis and Crossing Over In prophase I, duplicated homologues line up and become physically attached. Crossing over occurs where genetic information is rearranged between the non-sister chromatids comprising the tetrad. An “X” shaped region appears called the chiasma at the site of crossin ...
... 1. Synapsis and Crossing Over In prophase I, duplicated homologues line up and become physically attached. Crossing over occurs where genetic information is rearranged between the non-sister chromatids comprising the tetrad. An “X” shaped region appears called the chiasma at the site of crossin ...
Meiosis Vocabulary Flash Cards Meiosis Haploid Cells Gamete
... each parent will duplicate during S phase. • This creates enough genetic material to eventually form into 4 haploid sex-cells. ...
... each parent will duplicate during S phase. • This creates enough genetic material to eventually form into 4 haploid sex-cells. ...
Sample questions - I Exam
... contains three pairs of chromosomes. This organism is unusual in that no recombination between homologous chromosomes occurs during meiosis. (a) Assuming that the chromosomes are distributed independently during meiosis, how many different types of sperm or egg cells can a single individual of this ...
... contains three pairs of chromosomes. This organism is unusual in that no recombination between homologous chromosomes occurs during meiosis. (a) Assuming that the chromosomes are distributed independently during meiosis, how many different types of sperm or egg cells can a single individual of this ...
Mitosis vs. Meiosis Notes File
... • Meiosis makes sex cells or ____________ • In meiosis, cell division happens ___________and forms _________ cells with half the genetic material • Meiosis reduces the number of chromosomes to _______ of the original number of chromosomes • Meiosis provides genetic____________ because all of the sex ...
... • Meiosis makes sex cells or ____________ • In meiosis, cell division happens ___________and forms _________ cells with half the genetic material • Meiosis reduces the number of chromosomes to _______ of the original number of chromosomes • Meiosis provides genetic____________ because all of the sex ...
2) mitosis
... There are 3 stages in the cell cycle: 1) INTERPHASE – cells grow and prepare to divide 2) MITOSIS – cells start to divide 3) CYTOKINESIS– two cells are formed from one ...
... There are 3 stages in the cell cycle: 1) INTERPHASE – cells grow and prepare to divide 2) MITOSIS – cells start to divide 3) CYTOKINESIS– two cells are formed from one ...
Can You Divide - Cell Reproduction Notes
... • Anaphase – Centromeres separate – The two strands of chromosomes are pulled apart by centrioles towards opposite ends of the cell ...
... • Anaphase – Centromeres separate – The two strands of chromosomes are pulled apart by centrioles towards opposite ends of the cell ...
Study Guide
... Students will be able to identify the purpose of mitosis, the types of cells it occurs in and describe how the chromosomes behave through each phase (including the number of chromosomes present at the beginning and end of the process). (HSLS1-4) Students will be able to identify the purpose of meios ...
... Students will be able to identify the purpose of mitosis, the types of cells it occurs in and describe how the chromosomes behave through each phase (including the number of chromosomes present at the beginning and end of the process). (HSLS1-4) Students will be able to identify the purpose of meios ...
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.