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1. Which of the following is the best sample for the investigation of human chro

ID: 300879 • Letter: 1

Question

1. Which of the following is the best sample for the investigation of human chromosomes? A Onion root tip B. Rat testes C. Blood leukocytes D. None of the above 2. Which of the following is true for the length A. The largest is about 10pm long and the B. The largest is approximately 10cm long and smallest is about 2 um long the smallest is about 2 cm long always the same C. The p arm and q arm of chromosomes are D. All of the above are true 3. Which of the following statement is/are true A. B. C. D. for karyotype? Assemblage of metaphase chromosomes Arranged in pair Both A & B None of the above You are viewing a patient's karyotype. You see 23 chromosomes total. There are no homologous chromosomes. Which cell are 4. you viewing? A. Egg cell B. Zygote C. Skin cell D. Human leukocyte 5. In a karyogram, chromosome pairs are arranged According to the order of descending length and position of centromere According to thickness of chromosomes Based on the abnormalities present on the chromosome None of the above A. B. C. D. 6. Which of the following statement is true for A. Chromosome bands are observed with B. Short arms are designated p and long arms C. There are always 23 chromosomes in human chromosome? ethidium bromide staining are designated q None of the above D.

Explanation / Answer

1C) blood leucocyte from human

2.A) the largest is about 10?m and the smallest is 2 ?m in length.

chromosome 1 is the largest and chromosome 21 is smallest.

3. both A and B

4.A. Egg cell.

egg cells are haploid having 23 chromosome, and out of this one is X chromosome

5.A) according to the order of descending length and position fo centromere.

6.B) short arms are designated as p arm and long arms are designated q.