Home No title No title Ruhul Amin Alig The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase ? (A) 8 (B) 16 (C) 4 (D) 32 [NEET 2021 ]A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is : (1) Degenerate primer sequence (2) Okazaki sequences (3) Palindromic Nucleotide sequences (4) Poly(A) tail sequences [NEET 2021]Cell growth , normal metabolism and duplication of organelles occur in which of the following phase 1. S 2. M 3. G1 4. G2The given diagram represents which phase of cell-division? 1. Anaphase I 2. Anaphase II 3. Telophase I 4. Telophase IIThe following events occur during the process of meiosis. Arrange the following events of meiosis in the correct sequence. I. Terminalization II. Crossing over III. Synapsis IV. Disjunction of genomes (a) I, II, III, IV (b) II, III, IV, I (c) III, II, I, IV (d) IV, I, II, IIIWhich of the following does not lead to genetic variability? (a) Random fertilization. (b) Crossing over during meiosis. (c) Division of chromosomes during anaphase of mitosis. (d) Orientation of chromosomes during metaphase I of meiosis.In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to (a) segregation, independent assortment and crossing over. (b) segregation and crossing over. (c) independent assortment and crossing over.Four daughter cells formed after meiosis are (a) genetically similar (b) genetically different (c) anucleate (d) multinucleateIn Meiosis, (a) division of nucleus twice but DNA replicates only once. (b) division of nucleus twice and DNA replicates twice. (c) division of nucleus once and replication of DNA is also once. (d) division of nucleus once and DNA - replication is twice.Significance of meiosis lies in (a) reduction of chromosome number to one half. (b) maintaining consistancy of chromosome number during sexual reproduction. (c) production of genetic variability. (d) all of the above.The diagram shows a cell whose diploid chromosome number is four. Which one of the following option shows correct stage of cell ?Given below is the representation of a certain event at a particular stage of a type of cell division. Which stage is shown by the given figure?Mark the incorrect pair. (a) Interphase – S-phase (b) M phase – Metaphase (c) Meiosis I – Diplotene (d) Meiosis II – DiakinesisA. S phase – DNA replication B. Zygotene – Synapsis C. Diplotene – Crossing over D. Meiosis – Both haploid and diploid cells (a) A and B (b) C and D (c) B and D (d) A and CWhich one is correct about crossing over/genetic recombination? (i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I. (ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process. (iv) It is also the reciprocal transfer of genes between the non-homologous chromosomes (a) All of the above (b) All except (iv) (c) (ii), (iii) and (iv) (d) (iii) and (iv)Which of the following statement is not true for homologous chromosome pairs ? (a) They come from only one of the individual’s parents. (b) They usually contain slightly different versions of the same genetic information. (c) They segregate from each other during meiosis I. (d) They synapse during meiosis I.Interkinesis is a (a) stage between meiosis I and meiosis II. (b) stage between two mitotic divisions. (c) interphase. (d) both (b) and (c)In meiosis, division is (a) Ist reductional and IInd equational. (b) Ist equational and IInd reductional. (c) both reductional. (d) both equational.Assertion : Chiasmata is formed during diplotene. Reason : Chiasmata are formed due to deposition of nucleoproteins.Nuclear DNA exists as a complex of proteins called ______ that condenses into ______ during cellular division. (a) chromosomes, chromatin (b) chromatids, chromosomes (c) chromophores, chromatin (d) chromatin, chromosomesIf a meiocyte has 24 chromosomes in G1 phase, what will be the number of chromatids in each of the cells formed after meiosis II? (1) 12 (2) 24 (3) 48 (4) 96 Facebook Twitter Whatsapp Newer Older
A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is : (1) Degenerate primer sequence (2) Okazaki sequences (3) Palindromic Nucleotide sequences (4) Poly(A) tail sequences [NEET 2021]
Cell growth , normal metabolism and duplication of organelles occur in which of the following phase 1. S 2. M 3. G1 4. G2
The given diagram represents which phase of cell-division? 1. Anaphase I 2. Anaphase II 3. Telophase I 4. Telophase II
The following events occur during the process of meiosis. Arrange the following events of meiosis in the correct sequence. I. Terminalization II. Crossing over III. Synapsis IV. Disjunction of genomes (a) I, II, III, IV (b) II, III, IV, I (c) III, II, I, IV (d) IV, I, II, III
Which of the following does not lead to genetic variability? (a) Random fertilization. (b) Crossing over during meiosis. (c) Division of chromosomes during anaphase of mitosis. (d) Orientation of chromosomes during metaphase I of meiosis.
In meiosis, the daughter cells differ from parent cell as well as amongst themselves due to (a) segregation, independent assortment and crossing over. (b) segregation and crossing over. (c) independent assortment and crossing over.
Four daughter cells formed after meiosis are (a) genetically similar (b) genetically different (c) anucleate (d) multinucleate
In Meiosis, (a) division of nucleus twice but DNA replicates only once. (b) division of nucleus twice and DNA replicates twice. (c) division of nucleus once and replication of DNA is also once. (d) division of nucleus once and DNA - replication is twice.
Significance of meiosis lies in (a) reduction of chromosome number to one half. (b) maintaining consistancy of chromosome number during sexual reproduction. (c) production of genetic variability. (d) all of the above.
The diagram shows a cell whose diploid chromosome number is four. Which one of the following option shows correct stage of cell ?
Given below is the representation of a certain event at a particular stage of a type of cell division. Which stage is shown by the given figure?
Mark the incorrect pair. (a) Interphase – S-phase (b) M phase – Metaphase (c) Meiosis I – Diplotene (d) Meiosis II – Diakinesis
A. S phase – DNA replication B. Zygotene – Synapsis C. Diplotene – Crossing over D. Meiosis – Both haploid and diploid cells (a) A and B (b) C and D (c) B and D (d) A and C
Which one is correct about crossing over/genetic recombination? (i) It occurs in tetrad stage which occurs in pachytene of prophase I of meiosis I. (ii) It occurs between non-sister chromatids of homologous chromosomes. (iii) It is recombinase enzyme mediated process. (iv) It is also the reciprocal transfer of genes between the non-homologous chromosomes (a) All of the above (b) All except (iv) (c) (ii), (iii) and (iv) (d) (iii) and (iv)
Which of the following statement is not true for homologous chromosome pairs ? (a) They come from only one of the individual’s parents. (b) They usually contain slightly different versions of the same genetic information. (c) They segregate from each other during meiosis I. (d) They synapse during meiosis I.
Interkinesis is a (a) stage between meiosis I and meiosis II. (b) stage between two mitotic divisions. (c) interphase. (d) both (b) and (c)
In meiosis, division is (a) Ist reductional and IInd equational. (b) Ist equational and IInd reductional. (c) both reductional. (d) both equational.
Assertion : Chiasmata is formed during diplotene. Reason : Chiasmata are formed due to deposition of nucleoproteins.
Nuclear DNA exists as a complex of proteins called ______ that condenses into ______ during cellular division. (a) chromosomes, chromatin (b) chromatids, chromosomes (c) chromophores, chromatin (d) chromatin, chromosomes
If a meiocyte has 24 chromosomes in G1 phase, what will be the number of chromatids in each of the cells formed after meiosis II? (1) 12 (2) 24 (3) 48 (4) 96
