• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
powerpoint jeopardy
powerpoint jeopardy

... • These are cells that reproduce uncontrollably usually due to a mutation in the genetic information. ...
Genes
Genes

... Uniformity in genetics is seen in the following examples: • Genes = base sequences in DNA molecules • One chromosome = one DNA molecule with many genes on it • Genetic code similar in all • Basic processes of DNA replication, transcription, translation • Some genes are found in all organisms • All e ...
description
description

... The discoveryof how crossingover createsgametediversity confirmed the relationship between chromosome behavior and inheritance. Some of the first experimentsto demonstratethe effectsof crossingover were performed in the laboratory of American embryologist Thomas Hunt Morgan in the early 1900s.Morgan ...
AP Bio_ Unit _3 Homework Assignt _ IQ_s_Ch_
AP Bio_ Unit _3 Homework Assignt _ IQ_s_Ch_

... is the longest and which stage is the shortest? 6) Give three specific events that occur during prophase. How is Prometaphase different from prophase? 7) How are plant cell different from animal cells when they divide? ...
File
File

... 21. Place the following microorganisms in order from largest to smallest: bacteria, protozoa, viruses. 22. Describe the three main phases of cell reproduction: interphase, mitosis, and cytokinesis. 23. Do bacteria go through mitosis? Explain your answer. 24. Create a Venn diagram and compare and con ...
chapter 15 chromosomal basis of inheritance
chapter 15 chromosomal basis of inheritance

... be inherited together. Genetic recombination – the production of offspring with new combinations of traits inherited from two parents. 2 types of offspring can be produced:  Parental types – offspring matching a parental phenotype.  Recombinants – offspring that do not match either parent’s phenot ...
on the X chromosome of a male
on the X chromosome of a male

... A. Bee males have half the DNA of bee females, whereas human males have nearly the same amount of DNA that human females have. B. Considered across the genome, harmful (deleterious) recessives will negatively affect bee males more than Drosophila males. C. Human and Drosophila males have sons, but b ...
on the X chromosome of a male
on the X chromosome of a male

... A. Bee males have half the DNA of bee females, whereas human males have nearly the same amount of DNA that human females have. B. Considered across the genome, harmful (deleterious) recessives will negatively affect bee males more than Drosophila males. C. Human and Drosophila males have sons, but b ...
chapter_16
chapter_16

... Fig. 16.8, Unequal crossing-over w/paracentric inversion: (inversion does not include the centromere) ...
Crosses that involve two traits, such as pod color and pod shape
Crosses that involve two traits, such as pod color and pod shape

... that in two-factor crosses the genes controlling the two different traits are located on non-homologous chromosomes. During meiosis, non-homologous chromosomes assort independently. This means that each of the chromosomes of any pair of homologous chromosomes has an equal probability of ending up in ...
File
File

... in pea plants.  Between 1856 and 1863 Mendel cultivated and tested some 28,000 pea plants.  He was the first person to predict how traits are transferred from one generation to the next.  He studied only one trait at a time to control variables, analyzed data ...
Unit 4 Reproduction Suggested Time: 18 Hours
Unit 4 Reproduction Suggested Time: 18 Hours

... this process, but rather on understanding that this form of cell reproduction results in the production of two genetically identical daughter cells. Discussion of centrioles, centromeres, and the formation of spindle fibers are not required. Additionally, the distinction between early and late proph ...
Paper 2
Paper 2

... He planted 20 seeds from Population 1 and 20 seeds from Population 2 in two separate plots close to each other. The stamens of all the flowers of Population 1 were removed. Pollen from the flowers of Population 2 was used to pollinate the flowers of Population 1. The scientist harvested the seeds of ...
Lab 3: Testing Hypotheses about Mitosis
Lab 3: Testing Hypotheses about Mitosis

... difference between observed and expected values is small enough to be due to chance (meaning the  hypothesis may be true) or is too large to be due to chance (meaning the hypothesis produces a poor  prediction of your results and is unlikely to be true).  ...
Lecture 12
Lecture 12

... Nucleolus Nuclear Plasma envelope membrane ...
KS4 Chromosomes, Genes and DNA
KS4 Chromosomes, Genes and DNA

... In all living things, characteristics are passed on in the chromosomes that offspring inherit from their parents. So all human characteristics, including gender, must be something to do with chromosomes. Where are chromosomes found in cells? ...
Worksheet Packet
Worksheet Packet

... gametes.& & Repeat& these& steps& once& more,& this& time& focusing& on& the& effects& of& crossing& over.&&Start&back&at&Metaphase&I& with& your& clay& chromosomes.& & Assume& that& crossing& over& occurs& between& genes& A&and&B.&&Track&the&movement&of&the&chromosomes& through&Meiosis&I&and&II&int ...
Unit 3 - Transmission and Transmission and Molecular Genetics
Unit 3 - Transmission and Transmission and Molecular Genetics

... Fully Condensed Human Chromosomes ...
Cell Growth and Reproduction
Cell Growth and Reproduction

... 3. When the cytoplasm divides and you officially have 2 new cells, it is called cytokinesis. ...
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? ...
Lesson Plan – Teacher Name
Lesson Plan – Teacher Name

... Competencies Addressed with DOK: 3. Investigate and discuss the molecular basis of heredity. c. Relate gene expression (replication, transcription, translation) to protein structure & function. (DOK 2) • Translation of a messenger RNA strand into a protein • Processing by organelles so that the prot ...
Changes in chromosome number
Changes in chromosome number

... • Deletion the loss of a segment within one chromosome and the juxtaposition of the two segments on either side of the deleted segment – A. B C D E ...
Using the Simple Probability Rules
Using the Simple Probability Rules

... Although three plate have Dpy animals, we do not know whether these animals occurred because of a mutation on one chromosome or mutations on two chromosomes of the F1 (if two different genes – one on each chromosome – were mutated, then you would see animals homozygous for either chromosome that are ...
Mitosis Meiosis Study Guide
Mitosis Meiosis Study Guide

... C. division of the cell at inappropriate times, potentially with the wrong number of chromosomes D. CDKs will remain active throughout the cell division cycle and certain stages may occur out of order 11. Cells do not continue to divide randomly due to A. the activation of CDKs by cyclin B. the phos ...
12-1 Chromosomes and Inheritance patterns
12-1 Chromosomes and Inheritance patterns

... • How can crossing over between two alleles be used to map their locations on chromosomes • To make the map scientists mate organisms together and watch how often the genes get split up • Each percent of the time they get split up is one map unit. • By comparing many genes scientists can figure out ...
< 1 ... 61 62 63 64 65 66 67 68 69 ... 431 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report