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A cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:
ABO blood groups in humans are controlled by the gene I. It has three alleles – , and . How many phenotypes are possible?
A woman with 47 chromosomes, due to three copies of chromosome 21, is characterized by:
Match List I with List II: List I A. Down's syndrome B. Turner's syndrome (Inferred) C. Thalassemia (Inferred) D. Klinefelter's syndrome (Note: List II typically contains the chromosomal cause/karyotype)
A horizontal bridge is built across a river. A student standing on the bridge throws a small ball vertically upwards with a velocity $4 \text{ m s}^{-1}$. The ball strikes the water surface after $4 \text{ s}$. The height of bridge above water surface is: (Take $g=10 \text{ m s}^{-2}$)
Which of the following is/are related to STDs?
What is the pattern of inheritance for polygenic traits?
A test cross is carried out to:
A heterozygous pea plant with violet flowers was crossed with a homozygous pea plant with white flowers. Violet is dominant over white. Which one of the following represents the expected combinations among 40 progenies formed?
The unit of Planck's constant is:
Two bodies of different masses $m_a$ and $m_b$ are dropped from two different heights $a$ and $b$. The ratio of the time taken by the two to cover these distances is:
Which one of the following is not part of a transcription unit in DNA?
Reason for trisomy in Down's syndrome is:
Inheritance of skin colour in humans is an example of:
Point mutation involves:
Match the items given in Column I with those in Column II and select the correct option given below : Column I (a) Glycosuria (b) Gout (c) Renal calculi (d) Glomerular nephritis Column II (i) Accumulation of uric acid in joints (ii) Mass of crystallised salts within the kidney (iii) Inflammation in glomeruli (iv) Presence of glucose in urine
If a colour blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?
The marked part as 'x' in the given figure (L.S. of an Apple) is:
A body dropped from a height $h$ with an initial speed of zero, strikes the ground with a velocity $3 \text{ km/h}$. Another body of the same mass is dropped from the same height $h$ with an initial speed $u' = 4 \text{ km/h}$. Find the final velocity of the second body with which it strikes the ground.
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 are affected. Which of the following mode of inheritance might be the reason for this disease?