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प्रश्न
What is the inheritance pattern observed in the size of starch grains and seed shape of Pisum sativum? Workout the monohybrid cross showing the above traits. How does this pattern of inheritance deviate from that of Mendelian law of dominance?
उत्तर
The starch synthesis in pea plants is controlled by a single gene. It has two alleles B and b. BB homozygotes produced large starch grains as compared to that produced by bb homozygotes. After maturation it was observed that BB seeds were round and bb were wrinkled. When they were crossed the resultant progeny were intermediate-sized Bb seeds. The cross involved is
Deviation from Mendel's law of dominance: If starch grain size is considered as the phenotype, then from this angle, the alleles show incomplete dominance. Thus, dominance is not an autonomous feature of a gene, it depends on gene product and production of particular phenotype from this product.
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संबंधित प्रश्न
Explain the genetic basis of blood grouping in human population.
Work out a typical Mendelian dihybrid cross and state the law that he derived from it.
Work out a cross up to F1 generation only, between a mother with blood group A (Homozygous) and the father with blood group B (Homozygous). Explain the pattern of inheritance exhibited.
A woman with blood group O married a man with blood group AB shows the possible blood groups of the progeny. List the alleles involved in this inheritance.
Give a scientific term for the following:
An alternative form of the single gene which influences the same character and produces different expressions in different individuals a species.
When a single gene influences more than one traits it is called ______.
The gene that controls the ABO blood group system in human beings has three alleles -IA, IB, and i. A child has blood group O. His father has blood group A and mother has blood group B. Genotypes of other offsprings can be: ______
- IB IB
- IA i
- IB i
- IA IB
- ii
What does low hematocrit value represent?
Human with ______ blood group is considered as Universal Donor.
Approximately seventy precent of carbon dioxide absorbed by the blood with be transported to the lungs ______.
