Homework Answers
If nondisjunction occurs during meiosis I, this means that If nondisjunction occurs during anaphase I of meiosis I, at least one pair of homologous chromosomes did not separate. The end result is two cells that have an extra copy of one chromosome and two cells that are missing that chromosome. SO 4 gametes are affected.
If nondisjunction occurs during meiosis II then also 4 gametes will be affected because Miosis 1 is followed by Miosis 2.
The syndrome is known as DOWN SYNDROME.
trisomy 21 is a genetic condition caused by an extra chromosome. Most babies inherit 23 chromosomes from each parent, for a total of 46 chromosomes. Babies with Down syndrome however, end up with three chromosomes at position 21, instead of the usual pair.
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Sometimes there are mistakes when chromosomes are pulled apart during cell division. Match the answers to...
The following figure shows a cell containing a pair of homologous chromosomes. The alleles for the...
The following figure shows a cell containing a pair of
homologous chromosomes. The alleles for the F gene are indicated on
each chromosome. Which of the following most accurately represents
the configuration of chromosomes within the cell following DNA
replication, prior to meiosis?
Select one:
a.
b.
c.
d.
Which term is used to describe a pair of similar chromosomes in
a cell:
Select one:
a. bifurcates
b. homologous
c. chromatids
d. replicants
Which of the following statements is TRUE...
Show how a cell (2n=4) can go through nondisjunction in Meiosis II. How many chromosomes are...
Show how a cell (2n=4) can go through nondisjunction in Meiosis II. How many chromosomes are in each of the resulting gametes?
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...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is another purpose of meiosis other than stated in the question above? 36. How many cell divisions are involved in meiosis? (two) Do the cells also go through 37. What are homologous chromosomes? Do they contain the same alleles (different 38. How do homologous chromosomes line up on the metaphase plate in meiosis 1? How do 39. Understand the basic steps of meiosis. Please use...
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...
Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent...
Amounts of which of the components of cell cycle regulation vary with cell cycle phase? Cyclin-dependent kinases Cyclins Checkpoints Kinetochores The synaptonemal complex forms to facilitate pairing of homologous chromosomes during prophase of mitosis and meiosis. prophase of meiosis I and II. c. prophase of meiosis I only. d. all stages of meiosis. Mendel’s Second Law of Independent Assortment refers to the separation of two identical alleles of the same gene. two different alleles of the same gene. alleles...
Please answer these 3 questions please. During an infection: One B cell can make more than...
Please answer these 3 questions please.
During an infection: One B cell can make more than two different antibodies, provided that they recognize the same antigen Each B-cell produces antibodies to a variety of antigens A variety of antibodies are produced by many B cells, but each B cell only produces one type of antibody The same type of antibody is produced by many B cells Bicoid is important for generation of the anterior-posterior axis by regulating expression of multiple...
Please type long answers on a separate sheet and attach to this page to hand in....
Please type long answers on a separate sheet and attach to this page to hand in. 1. The five cells shown in figures a-e are all from the same individual. a) What is "n" in this organism? (0.5pts) b) Under each cell indicate i) which process depicted (mitosis, meiosis I, or meiosis II) and ii) what stage of cell division is represented. (1.25pt) A certain adult plant cell has 16 chromosomes. (1 point) (a) How many chromatids are in a...
Want to check answers for my final example questions. Can you please tell me the answers?...
Want to check answers for my final example questions. Can you please tell me the answers? A cell with a diploid number of 24 would have pairs of chromosomes and division via mitosis would result in cells containing chromosomes each. 24, 4, 24 24, 2, 12 12, 2, 24 12, 4, 12 12, 2, 24 The main role of mitosis is to: Generate cellular clones by copying a cell’s DNA and evenly dividing it between two haploid daughter cells. Increase...
Biology 108 Laboratory Manual: Fourth Edition. Follow-Up Questions for Chapter 5 (pg. 87-88) 1. Are sister...
Biology 108 Laboratory Manual: Fourth Edition.
Follow-Up Questions for Chapter 5 (pg. 87-88)
1. Are sister chromatids identical anymore after crossing over? Explain. 2. Could a karyotype determine if a person will have brown hair?! 3. Why is it so problematic if nondisjunction occurs during meiosis? Think of what would result. 4. You isolate a cell from the liver of a lab animal. After running a diagnostic test, you dis- cover there are 18 chromosomes in the cell. How many...
The following figure shows a cell containing a pair of
homologous chromosomes. The alleles for the F gene are indicated on
each chromosome. Which of the following most accurately represents
the configuration of chromosomes within the cell following DNA
replication, prior to meiosis?
Select one:
a.
b.
c.
d.
Which term is used to describe a pair of similar chromosomes in
a cell:
Select one:
a. bifurcates
b. homologous
c. chromatids
d. replicants
Which of the following statements is TRUE...
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...
produce haploid gametes; then those gametes can fuse to form a diploid zygote. 35. What is another purpose of meiosis other than stated in the question above? 36. How many cell divisions are involved in meiosis? (two) Do the cells also go through 37. What are homologous chromosomes? Do they contain the same alleles (different 38. How do homologous chromosomes line up on the metaphase plate in meiosis 1? How do 39. Understand the basic steps of meiosis. Please use...
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...
Please answer these 3 questions please.
During an infection: One B cell can make more than two different antibodies, provided that they recognize the same antigen Each B-cell produces antibodies to a variety of antigens A variety of antibodies are produced by many B cells, but each B cell only produces one type of antibody The same type of antibody is produced by many B cells Bicoid is important for generation of the anterior-posterior axis by regulating expression of multiple...
Please type long answers on a separate sheet and attach to this page to hand in. 1. The five cells shown in figures a-e are all from the same individual. a) What is "n" in this organism? (0.5pts) b) Under each cell indicate i) which process depicted (mitosis, meiosis I, or meiosis II) and ii) what stage of cell division is represented. (1.25pt) A certain adult plant cell has 16 chromosomes. (1 point) (a) How many chromatids are in a...
Biology 108 Laboratory Manual: Fourth Edition.
Follow-Up Questions for Chapter 5 (pg. 87-88)
1. Are sister chromatids identical anymore after crossing over? Explain. 2. Could a karyotype determine if a person will have brown hair?! 3. Why is it so problematic if nondisjunction occurs during meiosis? Think of what would result. 4. You isolate a cell from the liver of a lab animal. After running a diagnostic test, you dis- cover there are 18 chromosomes in the cell. How many...
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