Asexual Reproduction: Mitosis produces only genetically __________identical____________offspring. ANSWER: 2. Sexual Reproduction: Meiosis is a process to convert a ______diploid________ cell to a ____haploid________ gamete, and cause a change in the genetic information to increase ______diversity_________in the offspring. ANSWER(s): Next Summary of Chromosome Characteristics: 3. The diploid set of chromosomes for humans is 2n=____46________.
After meiosis the cells then undergo one round of mitotic division which gives rise to a total of eight haploid ascospores. Although S. fimicola is self fertile they can be crossed. It is the sexual phase where two haploid strains can fuse to form diploid zygotes (Mertens, 2001). These diploid zygotes are encased in the ascus. If two mycelia meet the two haploid nuclei can fuse to form a heterozygous diploid.
There are two types of chromosomes (male or female) X and Y, also known as the sex chromosomes. The chemical responsible for inherited characteristics and gender. They are found within DNA and protein seen in a dividing cell. Cytoplasm: The cytoplasm refers to all cell material outside the nucleus but within the cell boundary. This is a gel like fluid where chemical reactions take place.
Green algae appears as threads or sheets of green grass-like fibers that can be up to 3 feet long. It can float on the surface of water. Green algae can produce both sexually and asexually. It reproduces sexually by 2 cells coming together and seperating into many zoospores. It reproduces asexually by fission.
BIO 105160 Chapter 9/Lab 7 Homework Review Questions 1. What is a sexlinked trait? Why are more males than females affected by Xlinked recessive traits? With your answer in mind, what must be true for a particular Xlinked recessive trait to be expressed in a female? SexLinked trait: Sex linkage is the phenotypic expression of an allele related to the chromosomal sex of the individual.
Knowing more about the functions CENPJ and how it relates to Seckel syndrome and microcephaly in humans makes the material easier to understand. 2. Write at least 3 terms used in the paper that you needed to research. Karyotype: test to identify and evaluate the size, shape, and number of chromosomes in a sample of body cells Consensus sequence: the calculated order of most frequent residues, either nucleotide or amino acid, found at each position in a sequence alignment. Logarithm of odds score: Logarithm of the ratio of the probability of obtaining a set of observations, assuming a specified degree of linkage, to the probability of obtaining the same set of observations with independent assortment; used to assess the likelihood of linkage between genes from pedigree data.
10. Describe how the “packaging” of DNA to form a chromosome occurs. How many chromosomes does a human cell have? Why are there chromosome pairs? What are the sex chromosomes for a female?
Cristina Alzandua General Biology 1401 Dr. Erin Schuenzel February 13, 2014 Bacterial and Eukaryotic Cell Structures All organisms are composed of cells which are characteristically microscope in size. Cell size is limited by the efficiency of diffusion across the plasma membrane. A typical eukaryotic cell is 10 to 100 micrometers in diameter opposed to prokaryotic cells are 1 to 10 micrometers in diameter. Bacterial and Eukaryotic cells display different cell organization in their size and structure, but despite this all they display basic structural similarities as well. Differences between the structures of a bacterial and eukaryotic cell Bacteria cells are sheathed by a strong cell wall which is composed of peptidoglycan (polymer of sugar).
Both prokaryotic and eukaryotic cells can have thin extensions of the plasma membrane supported by elements of the cytoskeleton, including flagella and cilia in eukaryotes and flagella, end flagella, fimbriae and pili in prokaryotes. These extensions can function in motility (cell movement), to move materials around the outside of the cell, or to help the cell adhere to surfaces. The mechanics of how these extensions move differs between eukaryotes and prokaryotes. There are some prokaryotes and eukaryotes that possess a glycocalyx. These sticky sugar-based structures anchor cells to each other, help cells stick to surfaces, and provide some protection.
No other membranes are present within the cell. Prokaryotic cells contain only ribosomes and a nucleoid, or highly folded chromosomes. Both lack membranes and exist freely within the cytoplasm (www. tami-port.suite101.com). These organisms are classified further into two domains: Eubacteria and Archaebacteria (www.