Lab 8B: Modeling Mitosis and Meiosis
... Meiosis is the process of producing sex cells with a haploid set of chromosomes. Haploid means half the number of chromosomes as the original cell. A haploid cell contains one chromosome from each homologous pair. 1. Turn over your poster board and copy the diagram (right) onto the other side. Fill ...
... Meiosis is the process of producing sex cells with a haploid set of chromosomes. Haploid means half the number of chromosomes as the original cell. A haploid cell contains one chromosome from each homologous pair. 1. Turn over your poster board and copy the diagram (right) onto the other side. Fill ...
Mitosis ppt
... Cyclins are proteins (work based on concentration) and Cdk are enzymes (function when phosphorylated and connected to cyclin) and cause action to occur ...
... Cyclins are proteins (work based on concentration) and Cdk are enzymes (function when phosphorylated and connected to cyclin) and cause action to occur ...
WARNING:
... Chromosome – a threadlike strand inside the nucleus that is made up of DNA Mitosis – the process of cell division Asexual Reproduction – reproduction by simple cell division Sexual Reproduction – the form of reproduction in which cells from two parents unite to form a zygote Meiosis – the process th ...
... Chromosome – a threadlike strand inside the nucleus that is made up of DNA Mitosis – the process of cell division Asexual Reproduction – reproduction by simple cell division Sexual Reproduction – the form of reproduction in which cells from two parents unite to form a zygote Meiosis – the process th ...
somatic cells
... New strands of DNA created from existing strands Chromosome doubles into connected sister chromatids ...
... New strands of DNA created from existing strands Chromosome doubles into connected sister chromatids ...
Cell Division - Biology Junction
... line-up along metaphase plate like regular mitosis. • During anaphase 2, CENTROMERES BREAK and each chromosome is pulled to opposite sides of the cell. • Nuclei reform and ...
... line-up along metaphase plate like regular mitosis. • During anaphase 2, CENTROMERES BREAK and each chromosome is pulled to opposite sides of the cell. • Nuclei reform and ...
Cell Division Binary Fission, Mitosis & Meiosis
... line-up along metaphase plate like regular mitosis. • During anaphase 2, CENTROMERES BREAK and each chromosome is pulled to opposite sides of the cell. • Nuclei reform and ...
... line-up along metaphase plate like regular mitosis. • During anaphase 2, CENTROMERES BREAK and each chromosome is pulled to opposite sides of the cell. • Nuclei reform and ...
What creates variation in the offspring of sexually reproducing
... Mendel theorized that genetic traits are “independently assorted” and one trait does not depend on another for transmission to offspring. What do we know today that makes this theory invalid? Genes on the same ...
... Mendel theorized that genetic traits are “independently assorted” and one trait does not depend on another for transmission to offspring. What do we know today that makes this theory invalid? Genes on the same ...
Wanganui High School
... If a fruit fly has 8 A horse has 33 chromosomes in its chromosomes in its body cells how sex cells. How many will its sex many will it have in cells contain? its body cells? ...
... If a fruit fly has 8 A horse has 33 chromosomes in its chromosomes in its body cells how sex cells. How many will its sex many will it have in cells contain? its body cells? ...
What is DNA?
... by which DNA duplicate in order to form two identical cells • Cells need to reproduce to create new cells for growth, repair of tissue, (healing) and to produce other things our body needs. • Why do the body cells have to be identical? ...
... by which DNA duplicate in order to form two identical cells • Cells need to reproduce to create new cells for growth, repair of tissue, (healing) and to produce other things our body needs. • Why do the body cells have to be identical? ...
Section: Sexual Reproduction
... male human gamete (23) + female human gamete (23) = normal human cell (46) ...
... male human gamete (23) + female human gamete (23) = normal human cell (46) ...
MITOSIS THE HEREDITARY MATERIAL OF ORGANISMS (PLANTS
... BASIC WAYS: 1. SOMETHING CAUSES A DOUBLING OF THE CHROMOSOME NUMBER IN A CELL – THIS USUALLY HAPPENS IN A SOMATIC CELL, AND WHEN IT HAPPENS IN THE MERISTEM THE PLANT CAN BE AFFECTED (X-RAYS, UV LIGHT, CHEMICALS, ETC.) 2. SOMETHING GOES WRONG IN MEIOSIS, RATHER THAN REDUCING THE NUMBER OF CHROMOSOMES ...
... BASIC WAYS: 1. SOMETHING CAUSES A DOUBLING OF THE CHROMOSOME NUMBER IN A CELL – THIS USUALLY HAPPENS IN A SOMATIC CELL, AND WHEN IT HAPPENS IN THE MERISTEM THE PLANT CAN BE AFFECTED (X-RAYS, UV LIGHT, CHEMICALS, ETC.) 2. SOMETHING GOES WRONG IN MEIOSIS, RATHER THAN REDUCING THE NUMBER OF CHROMOSOMES ...
2.1 Mitosis + Meiosis notes
... Metaphase begins when the chromatid pairs line up along the center of the cell. This makes it possible for the chromatids to position themselves so that they can migrate to the opposite poles of the cell. Anaphase is the stage where this process occurs. The chromatid pairs split and the spindle fibe ...
... Metaphase begins when the chromatid pairs line up along the center of the cell. This makes it possible for the chromatids to position themselves so that they can migrate to the opposite poles of the cell. Anaphase is the stage where this process occurs. The chromatid pairs split and the spindle fibe ...
General Biology I / Biology 1306 Self Quiz Ch 12
... MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The centromere is a region in which A) chromosomes are grouped during telophase. B) chromatids remain attached to one another until anaphase. C) metaphase chromosomes become aligned at the metap ...
... MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) The centromere is a region in which A) chromosomes are grouped during telophase. B) chromatids remain attached to one another until anaphase. C) metaphase chromosomes become aligned at the metap ...
Reproduction and Meiosis
... of asexual reproduction (occurs in body cells) • In asexual reproduction the DNA and internal structures are copied • Then the parent cell ...
... of asexual reproduction (occurs in body cells) • In asexual reproduction the DNA and internal structures are copied • Then the parent cell ...
2-centrioles & fibers disappear
... 34. What is replication and where does it occur?(p. 297-299 & 246) • Replication is the copying of DNA during the S phase of Interphase that occurs in the nucleus ...
... 34. What is replication and where does it occur?(p. 297-299 & 246) • Replication is the copying of DNA during the S phase of Interphase that occurs in the nucleus ...
Sex Chromosome Biology in the Mammalian Kingdom All biological
... All biological differences between women and men originate from the sex chromosomes. Some 160 million years ago, the X and Y chromosomes were very similar, but since then the Y chromosome has lost most of its genes, whereas the present X chromosome contains more than 1000 genes. Hence, the dosage of ...
... All biological differences between women and men originate from the sex chromosomes. Some 160 million years ago, the X and Y chromosomes were very similar, but since then the Y chromosome has lost most of its genes, whereas the present X chromosome contains more than 1000 genes. Hence, the dosage of ...
Document
... • carriers of genetic material • usually chromatin: long strands of DNA which are wrapped around histone proteins • just before cell division, chromatin compacts and reorganizes into chromosomes – each chromosome internally duplicated – consists of two identical DNA chains (sister chromatids) attach ...
... • carriers of genetic material • usually chromatin: long strands of DNA which are wrapped around histone proteins • just before cell division, chromatin compacts and reorganizes into chromosomes – each chromosome internally duplicated – consists of two identical DNA chains (sister chromatids) attach ...
OGT Boot Camp LIFE SCIENCE
... Cell Biology – Mitosis Cells divide using mitosis. The result is two identical daughter cells. The cells are diploid, meaning they have two sets of chromosomes, one from each parent. ...
... Cell Biology – Mitosis Cells divide using mitosis. The result is two identical daughter cells. The cells are diploid, meaning they have two sets of chromosomes, one from each parent. ...
Cell Reproduction - Mrs. Rothwell`s Place
... • This stage is when the cell “grows” making more of its organelles (i.e. mitochondria, ribosomes) • The cell also makes an exact copy of it’s DNA by replicating it. (46 chromosomes to 92 chromatids) ...
... • This stage is when the cell “grows” making more of its organelles (i.e. mitochondria, ribosomes) • The cell also makes an exact copy of it’s DNA by replicating it. (46 chromosomes to 92 chromatids) ...
Georgia Travels
... During metaphase, where do the chromosomes align? • Metaphase plate • Metaphase line • Kinetechore • Spindle ...
... During metaphase, where do the chromosomes align? • Metaphase plate • Metaphase line • Kinetechore • Spindle ...
Cell Cycle Stages Worksheet
... Write the events in the correct steps of the cell cycle. Stage Events G1 Interphase ...
... Write the events in the correct steps of the cell cycle. Stage Events G1 Interphase ...
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.