workshop 5 - Workshop on Alternation of Generations by Dana...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Workshop on Alternation of Generations by Dana Krempels Introduction For students new to the study of Kingdom Plantae, the life cycle of plants--in which a diploid generation alternates with a haploid generation--can be difficult to understand. The purpose of this workshop is to allow the student to better relate to the phenomenon of Alternation of Generations by (1) examining the details of plant gametophyte and sporophyte structure and function, and (2) creating an animal analog to this type of life history. In today's workshop, your goals will be to 1. Understand the alternation of haploid and diploid individuals in the plant life cycle. 2. Understand the terminology used to describe parts of the life cycle, and recognize what each life cycle stage looks like in the major plant taxa. 3. Acquire a more "personal" understanding of how the alternation of generations works by designing an imaginary animal that goes through this type of life cycle. I. Alternation of Generations in Plants: Processes and Terminology The painful part comes first: knowing the general course of events, and what each life cycle stage and structure is called. A. An Overview of Alternation of Generations The plant life cycle, unlike that of animals, consists of alternating generations of individual organisms that are haploid (the gametophyte ) and diploid (the sporophyte ). Specialized diploid cells in the sporophyte undergo meiosis to produce haploid spores (hence the name "sporophyte"). Each spore grows mitotically to become the new gametophyte, which then produces gametes (hence, the name "gametophyte") which fuse to form a zygote . This grows into the sporophyte, and the cycle continues, as shown in the diagram below. In the diagram 1. Indicate the ploidy (n for haploid, 2n for diploid) of each life cycle stage or structure. 2. Over each of the five arrows, indicate which of the following processes is taking place: mitosis meiosis fertilization
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
B. Terminology Part of learning a new subject is learning its vocabulary and terminology. So here we go!
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern