Short Answer TypeName the respective pattern of inheritance where F1 phenotype
(a) does not resemble either of the two parents and is in between the two.
(b) resembles only one of the two parents.
Write the name of the following:
(a) The most common species of bees suitable for apiculture
(b) An improved breed of chicken
How is the entry of only one sperm and not many ensured into an ovum during fertilisation in humans?
Where is acrosome present in humans? Write its function.
Acrosome is a cap-like structure present in the anterior part of the head of the sperm. It contains the enzyme hyaluronidase, which hydrolyses the outer membrane of the egg, thereby helping the sperm to penetrate the egg at the time of fertilization.
Why is it desirable to use unleaded petrol in vehicles fitted with catalytic converters?
(a) Where do the signals for parturition originate from in humans?
(b) Why is it important to feed the newborn babies on colostrums?Given reasons for the following:
(a) The human testes are located outside the abdominal cavity.
(b) Some organisms like honey-bees are called parthenogenetic animals.
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