Homework Answers
1. Spermatogenesis occurs in the semniferous tubules.
2. Four spermatids arise from a single primary spermatocyte.
3. Synapsis or Syndesis is the process of pairing of homologous chromosome pairing seen in prophase 1 of meiosis.
4.during the S phase of the Interphase cycle, chromosomes are replicated.
5. In the G1 phase, the cell makes a variety of proteins, enzymes that are needed for DNA replication.
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1. In what structure of the testes does spermatogenesis occur? 2. How many spermatids arise from...
HILMIUSIS AND MEIOSIS 1. What structures are present in the phases? How many? (Use numbers like...
HILMIUSIS AND MEIOSIS 1. What structures are present in the phases? How many? (Use numbers like 2n, 1n, etc., and terms like dyads, tetrads, replicated chromosomes, chromatids, chromosomes,...) Mitosis Phase Prophase Meiosis Meiosis II Metaphase Anaphase Telophase Cytokinesis Ploidy level after all divisions of 2n cell Number & type of cells produced by division(s) Function in life cycle
SUMMARY – COMPARE MITOSIS AND MEIOSIS 1. What structures are present in the phases? How many?...
SUMMARY – COMPARE MITOSIS AND MEIOSIS 1. What structures are present in the phases? How many? (Use numbers like 2n, 1n, etc., and terms like dyads, tetrads, replicated chromosomes, chromatids, chromosomes, ...) Phase Mitosis Meiosis I Meiosis II Prophase Metaphase Anaphase Telophase Cytokinesis Ploidy level after all divisions of 2n cell Number & type of cells produced by division(s) Function in life cycle
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are...
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are in a human somatic cell? 46 chromosomes 3 The term used to refer to this full complement of chromosomes is the 4 How many chromosomes are in human gametes? 5 This is referred to as the number 6 Wa chicken's skin cell has 78 chromosomes, how many chromosomes would the chicken's sperm cell have? 7 How can we distinguish the 23 types of chromosomes...
9. Imagine an organism with a diploid number of 16. How many chromosomes would be present...
9. Imagine an organism with a diploid number of 16. How many chromosomes would be present in a typical cell during the G1 phase of the cell cycle? (Just give a number!) 10. Imagine an organism with a diploid number of 16. How many chromatids would be present during the G1 phase of the cell cycle? (Just give a number!) (2) 11. Imagine an organism with a diploid number of 16. How many chromatids would be present just before the...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes in new cells to half the number in the original cell. The parent cell is diploid (2n), and it begins meiosis with a replicated set of chromosomes. During meiosis, this parent cell Homologou will divide twice to create four haploid (1n) cells. pairs During prophase I of meiosis I, homologous pairs of chromosomes pair up and stick together to form tetrads through the process...
18. A biologist is studying programmed cell repaired, Based on this information, what would the biologist...
18. A biologist is studying programmed cell repaired, Based on this information, what would the biologist be stuu A. Cytokinesis Angiogenesis Apoptosis Metastasis E. Nondisjunction 19. Molecules which stimulate or inhibit cell division are referred to as: A. Control molecules B. Signaling molecules C. Contact molecules D. Transduction molecules Checkpoint molecules 20. Which of the following is not a characteristic of cancer cells? A. They undergo metastasis and promote angiogenesis B. They lack differentiation C. They are specialized D. They...
please help and thank you Materials Needed per class: 1 box of 24 microscope slides of...
please help and thank you
Materials Needed per class: 1 box of 24 microscope slides of meiosis 1 1 box of 24 microscope slides of meiosis 2 red and yellow popbead chromosome kits Objectives To become familiar with the process of meiosis and to be able to identify the principal phases of meiosis To understand how the process of meiosis is similar to mitosis and how it differs from mitosis Introduction The genetic information of a cell is encoded in...
Mitosis Meiosis 1. Define the Term 2. In what part of the body does it occur?...
Mitosis Meiosis 1. Define the Term 2. In what part of the body does it occur? 3. Does it start with DNA Replication? 4. How many total cell divisions does it include? Answer these questions about the CELLS PRODUCED BY THIS PROCESS (daughter cells): 5. Are they genetically identical to each other? 6. Are they genetically identical to the original parent cell? 7. Are they Haploid or Diploid? 8. In a human, how many chromosomes do they have?
2. Explain why the replication of one of the DNA strands is continuous while the other...
2. Explain why the replication of one of the DNA strands is continuous while the other strand is discontinuous. What causes this difference? 3. A) What are telomeres? B) Are telomeres present in both Prokaryotes and Eukaryotes? Explain why some cells have telomeres and others don't. 4. A) Draw a cell with 2 pairs chromosomes as it goes through the cell cycle and indicate the main things that happen to its chromosomes at each stage (label: sister chromatids, homologous chromosomes,...
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c....
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
HILMIUSIS AND MEIOSIS 1. What structures are present in the phases? How many? (Use numbers like 2n, 1n, etc., and terms like dyads, tetrads, replicated chromosomes, chromatids, chromosomes,...) Mitosis Phase Prophase Meiosis Meiosis II Metaphase Anaphase Telophase Cytokinesis Ploidy level after all divisions of 2n cell Number & type of cells produced by division(s) Function in life cycle
Check Your Understanding 3.1 1 What are chromosomes made of? number 2 How many chromosomes are in a human somatic cell? 46 chromosomes 3 The term used to refer to this full complement of chromosomes is the 4 How many chromosomes are in human gametes? 5 This is referred to as the number 6 Wa chicken's skin cell has 78 chromosomes, how many chromosomes would the chicken's sperm cell have? 7 How can we distinguish the 23 types of chromosomes...
Crossing-Over in Meiosis Meiosis is a process of nuclear division that reduces the number of chromosomes in new cells to half the number in the original cell. The parent cell is diploid (2n), and it begins meiosis with a replicated set of chromosomes. During meiosis, this parent cell Homologou will divide twice to create four haploid (1n) cells. pairs During prophase I of meiosis I, homologous pairs of chromosomes pair up and stick together to form tetrads through the process...
18. A biologist is studying programmed cell repaired, Based on this information, what would the biologist be stuu A. Cytokinesis Angiogenesis Apoptosis Metastasis E. Nondisjunction 19. Molecules which stimulate or inhibit cell division are referred to as: A. Control molecules B. Signaling molecules C. Contact molecules D. Transduction molecules Checkpoint molecules 20. Which of the following is not a characteristic of cancer cells? A. They undergo metastasis and promote angiogenesis B. They lack differentiation C. They are specialized D. They...
please help and thank you
Materials Needed per class: 1 box of 24 microscope slides of meiosis 1 1 box of 24 microscope slides of meiosis 2 red and yellow popbead chromosome kits Objectives To become familiar with the process of meiosis and to be able to identify the principal phases of meiosis To understand how the process of meiosis is similar to mitosis and how it differs from mitosis Introduction The genetic information of a cell is encoded in...
Mitosis Meiosis 1. Define the Term 2. In what part of the body does it occur? 3. Does it start with DNA Replication? 4. How many total cell divisions does it include? Answer these questions about the CELLS PRODUCED BY THIS PROCESS (daughter cells): 5. Are they genetically identical to each other? 6. Are they genetically identical to the original parent cell? 7. Are they Haploid or Diploid? 8. In a human, how many chromosomes do they have?
1. (2 pts) Homologous chromosomes a. come from different parents b. have the same genes c. may have different alleles d. have very similar DNA sequences e. all of the above f. none of the above 2. (3 pts) List the three ways that sexual reproduction increases the genetic variability of a population more than does asexual reproduction. 3. (2 pts) An organism has six independent (unlinked) genes and the following genotype: aaBbDdEEffag. How many different gametes could this organism...
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