Genetic Variation in Sordaria Finicola Introduction: The purpose of the Sordaria Lab was to explore the affects of genetic variation caused by meiosis and to record how sexual reproduction] affects the amount of crossing over in certain strains of Sordaria Fimicola. These organisms are ascomycetes and are also known as sac fungi. This is because the shape of their asci is in the form of a sac; inside each sac there are structures called ascospores. It is these structures‚ ascospores‚ where genetic
Premium Meiosis DNA Agar plate
Human Biology Stage 2B Revision – Test 1 Chapter 10 – Production of Gametes Gonads: Are the primary sex organs Secondary sex organs: Everything else‚ e.g. Seminal Vesicles Males Spermatozoa (sperm): Male gametes Scrotum: Single pouch of skin‚ divided into two sacs internally Lobules: Compartments filled with fine tubes called seminiferous tubules Seminiferous tubules: Fine tubes lined with cells that produce the male gametes. They eventually join together to form a short straight tubule
Premium Meiosis
the mitochondria (mitochondrial DNA or mtDNA) (U.S. National Library of Medicine‚ January 12‚ 2009‚ p. 1). This paper will explain the structure of DNA‚ discuss how the structure of DNA allows it to serve as the basis for inheritance‚ examine how meiosis allows DNA to be divided into gametes‚ and describe how this relates to Gregory Mendel’s patterns of inheritance. DNA consists of two long chains of nucleotides twisted into a double helix and joined by hydrogen bonds between the complementary
Premium DNA
Effects of Crossing Over in Sordaria fimicola Abstract Sexual reproduction in organisms is a cause for genetic variation. This can be seen through the process of meiosis in Sordaria fimicola because of the effects of crossing over and independent assortment that occur in meiosis I. Before performing this experiment we hypothesized that we would be able to see that crossing over did indeed occur in the S. fimicola. We tested our hypothesis by growing our own culture and observing it under a
Premium Meiosis Organism Virus
The following are events that occur in meiosis. For each name the stage in which it occurs. Remember to specify I or II. __________________ Chromatin condenses __________________ Crossing over occurs. __________________ Chromosomes are at the cells’s equatorial plane‚ but homologs are not
Premium Mitosis Chromosome Cell cycle
___________ _______________________________________________________________ _______________________________________________________________ © Houghton Mifflin Harcourt Publishing Company Holt McDougal Biology Options For Inquiry 1 Meiosis and Mendel Section 3: Mendel and Heredity Name _____________________________ Period___________________Date__________________ Probability Practice continued _______________________________________________________________ ______________
Premium Genetics Allele Gene
cells. What is the difference in result between mitosis and meiosis?mitosis lines up chromatids while meiosis lines up homologous chromosomes.. What are the resulting cells called? mitosis=diploid while meiosis is haploid. * What is independent assortment?Is the random assortment of chromosomes when gamates are in production. Crossing over? The crossing over of chromosomes during meiosis in homologous pairs. When does it happen?Meiosis * Chromosomes that are the same size and function are called
Premium DNA Gene Genetics
References: Audesirk‚ T.‚ Audesirk‚ G.‚ &Byers‚ B. (2008). Biology: Life on Earth with Physiology (8th ed.). Upper Saddle River‚ NJ: Pearson Education. Meiosis. (2007) Retrieved from http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/M/Meiosis.html
Premium DNA Amino acid RNA
Biology Test- Chapter 11: Introduction to Genetics Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Gregor Mendel used pea plants to study a. flowering. b. gamete formation. c. the inheritance of traits. d. cross-pollination. 2. Offspring that result from crosses between true-breeding parents with different traits a. are true-breeding. b. make up the F2 generation. c. make up the parental generation. d. are called hybrids. 3. The chemical
Premium Genetics Meiosis Allele
ECO EVO Study Guide Major Themes: Darwin’s Postulate 1. Heritable variation – (genotype) models of 1-3 loci‚ usually 2 alleles‚ produce heritable phenotypes 2. Organisms engage in a struggle for existence – per capita growth rates from survival and reproduction 3. Heritable traits influence outcome of the struggle – variation affects the struggle; phenotypes (determined by genotypes) influence per capita growth rates 3 Big Questions Biologists seek to answer: 1. Diversity
Premium Gene Genetics DNA