PPT-Meiosis Overview Sexual Reproduction

Defined Gametes from two separate parents unite Meiosis Diploid 2n to haploid n cells Mechanism that allows for genetic diversity Many eukaryotes reproduce in this manner Plants animals and fungi. Chapter . 11. Genes and Development. Fig. 11.1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.. Haploid sperm. Haploid egg. Diploid zygote. Fertilization. Meiosis. Meiosis is the cell division which produces the . sex cells . or . gametes. .. Meiosis occurs in the cells of the . reproductive organs. :. Sperm cells – testes. Ova (eggs) – ovaries. Pollen - anthers. The . disadvantages and advantages of sexual . reproduction. CfE. . Advanced Higher Biology. Unit . 2: . Organisms and Evolution. SQA mandatory key information. Disadvantages of sexual reproduction – males unable to produce offspring, only half of each parent’s genome passed onto offspring. Benefits outweigh disadvantages due to increase in genetic variation in the population. . Please take out your science journal and outcomes and turn in any missing work to the WIRE basket. Thank you!. . Asexual Reproduction Review. Happens in almost all cells (Somatic cells). 1 parent cell. 1. Make a Venn Diagram. 2. Asexual Reproduction. Sexual Reproduction. Both. Types of reproduction in living organisms. Asexual Reproduction. Requires only one parent. Offspring have 100% the same chromosomes as the parent.. LECA=last eukaryotic common ancestor as distinct from LUCA (last universal com. . a. nc.). Probably had the ability to reproduce sexually…how do we know this??. Transition to a sexual LECA involved 4 and we will focus on 3 “transitions. 1. Make a Venn Diagram. 2. Asexual Reproduction. Sexual Reproduction. Both. Types of reproduction in living organisms. Pass DNA from parent to offspring. Asexual Reproduction. Requires only one parent. ch. : 7. Sexual or Asexual. Asexual – involves a single parent organism and produces off-spring or daughter cells that are clones. Sexual Reproduction – involves genetic contribution in the form of gametes from two sources. Meiosis Terms . to Know:. Meiosis. : Cell division that produces gametes (sex cells/sperm & egg). These cells are used for sexual reproduction. They have . half . the number of chromosomes as the parent cell.. Review of Mitosis. Mitosis is a form of . asexual reproduction. This means that it . only requires 1 organism . (ex. Skin cells dividing). For growth and repair in . somatic. (body) cells!. Results in 2 cells identical to the original (parent) cell. Asexual reproduction: Overview. Example #1: . Garlic (. Allium sativum. ) . “As far as we know, garlic in cultivation throughout history has only been propagated asexually by way of vegetative cloves, bulbs, and bulbils (or topsets), not from seed. These asexually propagated, genetically distinct selections of garlic we cultivate are more generally called "clones". Yet this asexual lifestyle of cultivated garlic forgoes the possibility of combining traits proffered by interpollinating diverse parental stocks.”. Organisms that reproduce sexually are generally diploid: each cell contains two sets of chromosomes—a maternal chromosome set and a paternal chromosome set—one inherited from each parent. . . Google Images. Vocabulary. Somatic Cell. Gamete. Homologous Chromosomes. Diploid Cells ( 2n ). Haploid Cells ( n ). Normal body cell. Sex cell – sperm or egg. Matching pairs of chromosomes. Cells that have homologous chromosomes (somatic cells). Cell division / Asexual reproduction. Mitosis. produce cells with same information. identical daughter cells. exact copies. clones. same amount of DNA . same number of chromosomes. same genetic information.