Synapsis - Study guides, Class notes & Summaries

OCR GCE AS LEVEL BIOLOGY A PAPER 2 H020/02 JUNE 2022 FINAL MARK SCHEME DEPTH IN BIOLOGY. S1 chromosomes consist of two (sister) chromatids S2 chromosomes / chromatids, condense S3 nuclear, envelope / membrane, breaks down S4 centrioles move to opposite, poles / ends of the cell S5 spindle (fibres) form(s) any three points unique to meiosis (differences): D6 meiosis has, prophase 1 and 2 / two prophases D7 homologous chromosomes pair / bivalents form / synapsis occurs, in prophase (...

Title - correct answer a concise statement of the theoretical issues investigated and/or variables studied Abstract - correct answer An invaluable source of info brief synapsis of study packs info into 150 words or less problem that was investigated? how it was investigated? major findings? theoretical and practical implications of the study Introduction - correct answer begins the main body of the report illustrate the problem present the problem under investigation brief ...

BIO 191 FINAL EXAM NEWEST ACTUAL EXAM COMPLETE 400 QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)| ALREADY GRADED A+. Which of the following occurs in meiosis but not in mitosis? a. chromosome replication b. synapsis of chromosomes c. production of daughter cells d. alignment of chromosomes at the equator e. condensation of chromosomes - ANSWER-b. synapsis of chromosomes Matching homologous pairs before they are segregated. This happens in prophase 1. Which of the foll...

Asexual reproduction requires ____ individuals correct answer: one With the exception of identical twins, siblings who have the same two biological parents are likely to look similar, but not identical because they have correct answer: a similar but not identical combination of genes. The following statement regarding the function of mitosis is false correct answer: Mitosis allows organisms to generate genetic diversity. The following statement is false correct answer: Gametes are m...

Sister chromatids are which of the following? a. Found right after a cell divides. b. Formed when chromatids separate during cell division. c. Unique to prokaryotes. d. Tightly linked together at a centromere. e. Made only of DNA - Answer-d. Tightly linked together at a centromere. Looking into your microscope, you spot an unusual cell. Instead of the typical rounded cell shape, the cell has a very narrow middle separating two bulging ends. It sort of looks like the number 8! Then you re...

LIFSCI 7B XL - Animation: Meiotic Cell Division Copy Questions and Answers 100% Pass Question: What is the primary purpose of meiosis in cell biology? Answer: The primary purpose of meiosis is to produce gametes (sperm and eggs) with half the number of chromosomes as the parent cell, facilitating sexual reproduction and genetic diversity. Question: How many stages are there in meiosis, and what are they called? Answer: Meiosis consists of two main stages: Meiosis I and Meiosis II...

Straighterline Intro to Biology 101 Chapter 5 Latest Update Graded A+ Somatic cells Body cells Apoptosis programmed cell death Cell cycle orderly set of stages that take place between the time a cell divides and the time the resulting cells also divide Chromatid One DNA molecule Sister Chromatids identical DNA sequences Mitosis division of nucleus and genetic material Cytokinesis division of cytoplasm Caspases enzymes that bring about apoptosis Proto-oncogenes encode...

Student Name: Click here to enter text. Access Code (located on the lid of your lab kit): Click here to enter text. Pre-Lab Questions 1. What are chromosomes made of? Chromosomes are structures composed of DNA and proteins known as chromatin. Within chromatin, there is a component called a nucleosome. 2. Compare and contrast mitosis and meiosis. Both meiosis and mitosis start with only two chromosomes and involve the creation of new cells. However, meiosis does not involve crossing over ...

What is the path of light through the compound microscope? - ANSWER Light source --> condenser --> specimen --> objective lens --> ocular lens The image from the objective lens is magnified again by the ocular lens. What are the steps of a gram-stain? - ANSWER 1) Primary stain (crystal violet) - 1 minute 2) Mordant (Gram's iodine) - 1 minute 3) Decolorizing agent (ethanol) - 5 seconds 4) Counterstain (safranin) - 1 minute *blot dry, not wipe What is this specimen? -...

Kinetochores - protein structures located on the centromeres that serve as attachment points for specific fibers of the spindle apparatus (kinetochore fibers) metastasis - distant spread of cancerous cells through the bloodstream or lymphatic systems Mitosis - 2 identical cells created from a single cell Cytokinesis - splitting of cytoplasm and organelles into 2 daughter cells Haploid (n) - cells that contain only 1 copy of each chromosome example-germ cells Diploid (2n) - contai...