.A woman with 47 chromosomes due to 3 copies of chromosome 21 is characterized by AIPMT - 2005

Related MCQs

• Which of the following statement is/are correct for Meiosis-II ? (i) Chromosomes are arranged on equatorial plate in prophase-II (ii) Nucleolus disappear during telophase-II (iii) In anaphase-II, the chromatids with their independent centromeres are called chromosomes. (iv) In metaphase-II, centromere of each chromosome becomes attached to filament of bipolar spindle.
• . A man and a woman, who do not show any apparent signs of a certain inherited disease, have Seven Children (2 daughters and 5 sons). Three of the Sons suffer from the given disease but none of the daughters affected. Which of the following mode of inheritance do you suggest for this disease? AIPMT - 2005
• Match the following using salient features of Human genome project A B (P) Less than 2 % genome (i) 3 billion nucleotide bases (Q) Chromosome 1 (ii) 231 genes (R) Y chromosome (iii) 2968 genes (S) Human genome (iv) codes for protein
• If there are four chromosomes present during prophase – I, how many chromosome are there in each cell at the end of anaphase - II
• Down's Syndrome is caused by an extra copy of chromosome number 21. What percent age of off spring produced by an affected mother and a normal father? AIPMT - 2003
• A. During interphase, chromosomes are recognized as chromatin network. R. Chromosomes are highly dispersed during this phase.
• A. Number of chiasmata is more in longer chromosomes. R. The number of chiasmata depends on the length of chromosomes.
• Match the following : Coulmn-I Coulmn-II (A) Prophase-I (i) Chromosomes move toward one plane along with centromere. (B) Metaphase-II (ii) Half the number of chromosomes in seen (C) Anaphase-I (iii) Longest phase of meiosis-I (D) Telophase-I (iv) Two nuclei are seen
• Which of the following statement is/are correct for Prophase-I ? (i) During diplotene, the members of each pair of homologous chromosomes start moving away from one another. (ii) In zygotene, bivalent chromosomes appear tetravalent. (iii) In diakinesis, chromatids become separated even at the site of chiasmata.
• What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ?