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Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In polygenic inheritance, the effect of each allele is additive. In the light of the above statements, choose the correct answer from the options given below:
Name the enzyme that facilitates opening of DNA helix during transcription.
The mother has A+ blood group, the father has B+ and the child is A+. What can be possible genotypes of all three, respectively?
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)
Which of the following is/are related to STDs?
F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of:
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 production of gametes by the parents, formation of zygotes, the F1 and F2 plants, can be understood from a diagram called:
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:
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:
Given below are some stages of human evolution. Arrange them in the correct sequence (Past to Recent): A. Homo habilis B. Homo sapiens C. Homo neanderthalensis D. Homo erectus