Homework Answers
Ans
1). Crossing over
Crossing over and recombination are two processses that produce genetic variation. It occurs during the pachytene stage of prophase 1 in meosis .During crossing over two homologous chromosomes exchange a portion of their sequence . Or day its ihe exchange of DNA fragments between two homologous chromosomes.
Independant assortment is a process that ocurs during gametogenesis ( metaphase1 of meosis 1) where the alleles for a trait separate independent of each other in gametes .
Non disjunction occurs during cell divison ( anaphase 1 of meosis 1 or whenmeosis ll) non sister chromatids fail to separatem this can result in an extra chromosome in on eof the daughter cells .
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During meiosis what is the process that creates new combinations of alleles along a single chromosome?...
What creates different combinations of maternal and paternal chromosomes in an organism's gametes (i.e. its sperm...
What creates different combinations of maternal and paternal chromosomes in an organism's gametes (i.e. its sperm or eggs)? In other words, this is why all sperm (or eggs) are not genetically identical, and why you look different from your siblings. crossing over independent assortment nondisjunction meiosis 11
Homologous chromosomes pair along their length during prophase 1 of meiosis.
Question 36 Homologous chromosomes pair along their length during prophase 1 of meiosis. While two homologues are paired, genetic exchange may occur between them in a process called _______ syngamy nondisjunction independent assortment crossing over Question 37 At the end of meiosis II, there are _______ 2 haploid daughter cells that are genetically different 4 haploid daughter cells that are genetically identical 4 haploid daughter cells that are genetically different 2 diploid daughter cells that are genetically identical 4 diploid daughter cells that are genetically differentQuestion 38 When do homologous chromosomes separate from...
2. Which of the following occurs during mitosis but not during meiosis I?
2. Which of the following occurs during mitosis but not during meiosis I? a. The chromosomes are pulled to opposite poles of the spindle apparatus. b. The chromatids of each chromosome are separated. c. The nuclear envelope breaks down. d. Both synapsis and crossing over take place. e. The diploid number of chromosomes is reduced to the haploid number.3. Table 1 shows the stage and number of cells and chromosomes per cell at the end of the stage in a 2n - 24 organism. u...
7. Name the event of meiosis that ensures that the chromosome number is reduced. 8. During...
7. Name the event of meiosis that ensures that the chromosome number is reduced. 8. During which stage of meiosis does each of the following events occur? 2. Synapsis b. Crossing-over . c. Segregation of homologous chromosomes d. Reduction from diploid to haploid e. Separation of chromatids f. Independent assortment of homologous chromosomes. 9. Many people have the misconception that a dominant allele must be the most common in a population. Address this misconception by using the finger number trait...
Which process adds new alleles to the gene pool of a species? independent assortment sexual reproduction...
Which process adds new alleles to the gene pool of a species? independent assortment sexual reproduction crossing over mutation
Nondisjunction of sex chromosomes during MALE meiosis II, results in sperm with what chromosome composition? What...
Nondisjunction of sex chromosomes during MALE meiosis II, results in sperm with what chromosome composition? What about at Meiosis I? PLEASE DRAW A PICTURE
Crossing over, or synapsis, is a process during which __________ exchange segments of DNA. Crossing over...
Crossing over, or synapsis, is a process during which __________ exchange segments of DNA. Crossing over occurs during _________ of meiosis, and it contributes to genetic diversity because it creates new combinations of genes. Fill in the Blanks.
Consider a human germ cell undergoing normal meiosis (with only chromosome 23 shown). The dark blue...
Consider a human germ cell undergoing normal meiosis (with only chromosome 23 shown). The dark blue represents the maternal chromosome and the light blue represents the paternal chromosome. Which of the 6 possible gamete types would you observe following the completion of meiosis (Choose all that apply)? 3. Consider the same human germ cell. If a single chromosome nondisjunction event occurs during meiosis I, which gamete types will you expect following the completion of meiosis (Choose all that apply)? 4....
1) An organism has 2n = 6 chromosomes with alleles A B / a b on...
1) An organism has 2n = 6 chromosomes with alleles A B / a b on the chromosome 1 homologous pair, alleles D / d on the chromosome 2 homologous pair, alleles E F / e f on the chromosome 3 homologous pair. Show two different ways that chromosomes could align at the metaphase plate during Meiosis I (show the chromosomes and alleles). Assume no crossing over. How many combinations of chromosomes are possible in the gametes? Please show me...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can...
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
What creates different combinations of maternal and paternal chromosomes in an organism's gametes (i.e. its sperm or eggs)? In other words, this is why all sperm (or eggs) are not genetically identical, and why you look different from your siblings. crossing over independent assortment nondisjunction meiosis 11
2. Which of the following occurs during mitosis but not during meiosis I? a. The chromosomes are pulled to opposite poles of the spindle apparatus. b. The chromatids of each chromosome are separated. c. The nuclear envelope breaks down. d. Both synapsis and crossing over take place. e. The diploid number of chromosomes is reduced to the haploid number.3. Table 1 shows the stage and number of cells and chromosomes per cell at the end of the stage in a 2n - 24 organism. u...
7. Name the event of meiosis that ensures that the chromosome number is reduced. 8. During which stage of meiosis does each of the following events occur? 2. Synapsis b. Crossing-over . c. Segregation of homologous chromosomes d. Reduction from diploid to haploid e. Separation of chromatids f. Independent assortment of homologous chromosomes. 9. Many people have the misconception that a dominant allele must be the most common in a population. Address this misconception by using the finger number trait...
Consider a human germ cell undergoing normal meiosis (with only chromosome 23 shown). The dark blue represents the maternal chromosome and the light blue represents the paternal chromosome. Which of the 6 possible gamete types would you observe following the completion of meiosis (Choose all that apply)? 3. Consider the same human germ cell. If a single chromosome nondisjunction event occurs during meiosis I, which gamete types will you expect following the completion of meiosis (Choose all that apply)? 4....
You see a recombination frequency of 50% between two genes. Which of the following possibilities can you exclude? That the genes are located close together on the same chromosome That the genes are on different chromosomes O That the genes are assorting independently That the genes are located on the same chromosome, but very far apart Meiosis contributes to genetic diversity by: o Reducing the number of chromosomes for karyogamy (fusion of nuclei) with another gamete O Recombining homologous chromosomes...
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