Imagine cell 1 will produce eggs (but meiosis has not commenced yet). Cell 1 Cell 2 Cell 3 Thinking about the long chromosome, eggs could have which genotype at the A and B genes, assuming no recombination from crossover? (Click all that are true). Aa Bb ab AB aB Ab OAaBb O AABB O aabb 580 ... JAN OO0 O0 0
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Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
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- Comic San.. BIUA ===|三 Normal text 12 II1 3 CP Unit 6 Review: Meiosis Page 1. What type of cell undergoes meiosis? Gamete cells Somațic cells or 2. What are homologous chromosomes? 3. For each of the following state if the cell is haploid or diploid. Sperm cell = Liver cell = Egg cell = Stomach cell = 4. If the diploid number in a liver cell is 52, how many chromosomes are there in the egg of this organism? 5. During meiosis, the chromosome number: a) is doubled becomes diploid b) is reduced c) remains the same d) 6. Cells starting mitosis & meiosis begin with a (haploid or diploid) set of chromosomes. 7. How many times do cells divide during meiosis? 8. What are the stages of meiosis called? Meiosis I: II lılıning.com/index.cfm?method%3DcResource.dspView&ResourcelD=1070&ClassID=D385 O C. Prophase l OD. Anaphase II 2. The gametes in the image below could have formed from which parent? OA Male OB. Female C Male or female D. Neither male nor female 3. Which healthy gamete could not result from the parent cell shown? acervivo V20 male or female. Remember that since most sex-linked traits are recessive, the person wno shows the trait can have no X's with big superscripted letters. So, y a male carries the trait, he must also show the trait. XDY XDXD XªY PXPX Carrier? (Yes or No) Has the Trait? (Yes or No) Male or Female Phenotype or Appearance of the Individual Guided Questions: 1. What chromosomes will result to a normal phenotype (normal spongy pore trait)? 2. Do all individuals who have the spongy tiny pore allele show it in their physical appearance? Why or why not? 3. Can males be a carrier of an X-linked recessive trait? How about females? Explain. 4. What will be the sex of an individual who is easily affected by an X-linked recessive trait? Why?. The Y chromosome is missing this section of the X chromosome. The lower sections Males are at greater risk for inheriting
- z e 50 μm Figure 3. Grasshopper testis with differential staining and viewed under a microscope. Encircle the cell and label the specific stage in the meiosis it displays. Identify as many as you can witha minimum of two cells representing different stages. Make sure to specify whether the stage belongs to meiosis I or II. If you identify a cell at prophase I, then specify the substage.Content MasteringBiology: Mitosis/Meios x A session.masteringbiology.com/myct/itemView?assignmentProblemID=174963736&offset=next KMitosis/Meiosis Assignment (Part 2) (Unit 3) Learning through Art: Sex-linked Cross 6 of 11 female must have two copies of the recessive allele to have the disease. A human male (XY), on the other hand, has only one X chromosome, and so needs only one copy of the recessive allele to have the disease. Complete the Punnett square below of a cross between a carrier mother (a female who carries one copy of the recessive allele and so appears normal herself) and a non-hemophiliac father. 1. Drag the pink labels to the pink targets to indicate the sex dictated by the genotype in each box. (Pink labels may be used more than once.) 2. Drag the blue labels to the blue targets to indicate whether the genotype in each box confers hemophilia, normal, or carrier status. (Blue labels may be used more than once.) Reset Help x"x (carrier) mother xHY (normal) father Sperm…Fill in the blanks. The parentheses represent choices for each blank. In sexual reproduction, _____ (meiosis, mitosis) produced genetically diverse _______ (diploid cells, haploid gametes, triploid cells).
- otypes. Inference: Revision: Parent 2 rryy Gametes ry Parent 1 RY RrYy RRYY The F, generation are all RrYy. ROund seeds 1. What is the phenotype of parent 1?. 2. What is the genotype of parent 1? 3. What is the phenotype of parent 2? 4. What is the genotype of parent 2? 5. What is the phenotype of the F, offspring? 6. What is the genotype of the F, offspring?. 7. What kind of cross does this figure describe? 1 Chapter 12 Introduction to Genetics Copyright Pearson Education, Inc., or its affiliates. All rights re GametesNeed help with three question. Multiple choise. 1.) How is the outcome of meiosis different from the outcome of mitosis? a.) The daughter cells produced in mitosis are genetically different from the parent cells, but have the same number of chromosomes, while these are genetically similar in case of meiosis and have fewer chromosomes. b.) The daughter cells produced in mitosis are genetically similar to the parent cells and have the same number of chromosomes, while these are genetically different in meiosis and have half the number of chromosomes. c.) The daughter cells produced in both cases are genetically similar to the parent cells, but in meiosis, there are fewer chromosomes. d.) The daughter cells produced in both cases are genetically different, but in mitosis, there are fewwer chromosomes in daughter cells. 2.) What would be the effect on the number of chromosomes in gametes due to non-disjunction? a.) The chromosome number of the gametes remains the same as the parent…50 μm Figure 3. Grasshopper testis with differential staining and viewed under a microscope. Encircle the cell and label the specific stage in the meiosis it displays. Identify as many as you can witha minimum of two cells representing different stages. Make sure to specify whether the stage belongs to meiosis I or II. If you identify a cell at prophase I, then specify the substage. SALE
- RNING SERVICES SQU LIBRARIES SQU PORTAL ATTENDANCE ENGLISH (EN) Answer: AMYLOSE The sperm of Panthera leo contains 19 chromosomes, which of the following is/are true about somatic cells? Select one or more: a. The Panthera leo cells normally contain 38 homologous chromosome pairs b. Panthera leo normally has 38 chromosomes in its body cells c. There are 38 sister chromatids per cell in G2 phase d. The somatic cell contains 38 sister chromatids e. There are 76 sister chromatids per cell in G2 phase A mutation in genes responsible for microtubule formations will most probably prevent the cells from passing metaphase of mitosis.Bio-123 Meiosis Post Lab Draw a cell (2n-6) going through the entire process of Meiosis. Start out at the END of Interphase. Draw the major events of each process indicated underneath each "cell" circle 10 Prophase I Show Synapsis Prophase l Show the result of Interphase Show replicated chromosomes with Chiasmata Crossing over Show recombinant Show tetrads Chromosomes in Show tetrads Metaphase I Show lining up of Anaphase I Show separation of Homologs chromosomes Telophase I Show separated chromatids, formation of nuclear membrane, recombinant chromosomes disintegration of spindle fibers ed on next page t Lab V2a.Docx Page 3 Revised 11/3/2019Fill in the blanks. The parentheses represent choices for each blank. In both mitosis and ________ (meiosis I, meiosis II) , a spindle forms and separates sister chromatids. While mitosis produces two nuclei, meiosis II produces _________ (four haploid nuclei, two haploid nuclei).