During what phase of cell division do you expect to see the homologous chromosom

Question

During what phase of cell division do you expect to see the homologous chromosomes attached to each other, exchanging DNA segments with each other? A. Prophase in Mitosis B. Prophase in Meiosis I C. Prophase in Meiosis II D. Anaphase in Meiosis II E. Anaphase in Mitosis 2. A somatic human cell (any cell in the body except gametes) has 23 pairs (2n = 46) of chromosomes. What is the chromosomal conformation of human cell at the end of meiosis? A. It will have 23 chromosomes, each composed of two sister chromatids B. It will have 46 chromosomes, each composed of two sister chromatids C. It will have 23 chromosomes, each composed of a single chromatid D. It will have 46 chromosomes, each composed of a single chromatid Meiosis contributes to genetic diversity by: A. Reducing the number of chromosomes to allow karyogamy (fusion of nuclei) with another gamete B. Recombining homologous chromosomes during crossing over C. Random orientation of homologous chromosomes during metaphase D. Random orientation of recombinant chromatids during metaphase II E. All of these contribute to genetic diversity Which of the following is true when comparing meiosis to mitosis? A. Both, meiosis I and mitosis, divide the homologous chromosomes among the cells. B. Both, meiosis II and mitosis, divide the sister chromatids among the daughter cells. C. In both, meiosis and mitosis, homologous chromosomes are joined to each other. D. Both, meiosis and mitosis imply a reduction in the number of chromosomes E. Both, meiosis and mitosis can occur in any cell of the body Eyelash length is an inherited trait in humans. The allele for long eyelashes is dominant (L) and t allele for short eyelashes is recessive (1). An individual who is heterozygous for eyelash length would produce which of the following gametes? A. All gametes would have the I allele. B. All gametes would have the L allele. C. Half of the gametes would have the L allele and half of the gametes would have the I allele. D. The proportion of gametes receiving each allele would be random E. The dominant allele (L) is more likely to be passed on in a gamete

Explanation / Answer

Question 1

Exchanging dna segments with each other anaphase

prophase I of meiosis

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HENCE OPTION A-------WRONG ANSWER

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Prophase II

IT IS FORMATION OF a spindle apparatus.
- Chromsomes, each still composed of 2 chromatids associated at the centromere.

THEY move toward the metaphase II plate

HENCE OPTION C-------WRONG ANSWER

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Anaphase II

THERE IS breakdown of proteins holding the sister chromatids together at the centromere .

HENCE OPTION D-------WRONG ANSWER

Question 2

It will be 23 chromosomes each composed of a single chromatids----------option C-------answer

Telophase II & Cytokinesis

HENCE OPTION C-------CORRCT ANSWER

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Four haploid daughter cells WITH SINGLE CHROMATIDS

HENCE OPTION A-------WRONG ANSWER

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Four haploid daughter cells FORMED AT THE END OF MEIOSIS

HENCE OPTION B-------WRONG ANSWER

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Four haploid daughter cells FORMED AT THE END OF MEIOSIS

HENCE OPTION D-------WRONG ANSWER

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Question 3

option E-------answer

ALL OF THESE CONTRIBUTE TO GENETIC DIVERSITY

Question 5

option C-------answer

HETEROZYGOUS GENOTYPE-Ll

Forms

half gametes with L allele

half gametes with l allele during gametogenesis

Question 1

Exchanging dna segments with each other anaphase

prophase I of meiosis

1. During prophase I,
2. The homologous chromosomes condense and become visible as the x shape .
3. They pair up to form a tetrad.
4. They exchange genetic material by crossing over.
5. HENCE OPTION B-------CORRCT ANSWER

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1. Chromosomes become visible,
2. the nucleolus disappears,
3. the mitotic spindle forms,
4. and the nuclear envelope disappears

HENCE OPTION A-------WRONG ANSWER

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Prophase II

IT IS FORMATION OF a spindle apparatus.
- Chromsomes, each still composed of 2 chromatids associated at the centromere.

THEY move toward the metaphase II plate

HENCE OPTION C-------WRONG ANSWER

-----------------------------------------------

Anaphase II

THERE IS breakdown of proteins holding the sister chromatids together at the centromere .

HENCE OPTION D-------WRONG ANSWER

Question 2

It will be 23 chromosomes each composed of a single chromatids----------option C-------answer

Telophase II & Cytokinesis

1. Four haploid daughter cells forming, containing unduplicated chromsomes.

HENCE OPTION C-------CORRCT ANSWER

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Four haploid daughter cells WITH SINGLE CHROMATIDS

HENCE OPTION A-------WRONG ANSWER

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Four haploid daughter cells FORMED AT THE END OF MEIOSIS

HENCE OPTION B-------WRONG ANSWER

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Four haploid daughter cells FORMED AT THE END OF MEIOSIS

HENCE OPTION D-------WRONG ANSWER

--------------------------------------------------------------------

Question 3

option E-------answer

ALL OF THESE CONTRIBUTE TO GENETIC DIVERSITY

Question 5

option C-------answer

HETEROZYGOUS GENOTYPE-Ll

Forms

half gametes with L allele

half gametes with l allele during gametogenesis

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