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Thalassemia and sickle cell anaemia are caused due to a problem in globin molecule synthesis. Select the correct statement:
The oocytes of some vertebrates get arrested for years or months in:
Study the pedigree chart given below: What does it show?
Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate?
Stems modified into flat green organs performing the functions of leaves are known as?
The allele for tallness is dominant over that of dwarfness. This is called:
In his classic experiments on pea plants Mendel did not use?
What is the direction of the micropyle in the anatropous ovule?
Choose the mismatched pair of leaf character with its example:
A genetic map is one that:
During cell growth, DNA synthesis takes place in:
Crossing over that results in genetic recombination in higher organisms occurs between:
Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called:
As per ABO blood grouping system, the blood group of father is B+, mother is A+ and child is O+. Their respective genotype can be
A dioecious flowering plant prevents both:
Which one of the following can be explained as the basis of Mendel's Law of dominance? A: Out of one pair of factors, one is dominant and the other is recessive. B: Alleles do not show any expression and both the characters appear as such in F2 generation. C: Factors occur in pairs in normal diploid plants. D: The discrete unit controlling a particular character is called factor. E: The expression of only one of the parental characters is found in a monohybrid cross.
At which stage of the cell cycle does DNA replication occur:
In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?
Which of these statements is incorrect?
Which one of the following is heterosporous?