BIOLOGY M.C.Q [1M]

Haemophilia
Explanation: The inheritance pattern of a certain type of trait in humans shown above is haemophilia. A son cannot inherit the defective gene from his father. This is a recessive trait and can be passed on if cases are more severe with the carrier. Genetic testing and genetic counselling are recommended for families with haemophilia. The disease is X- linked and the father cannot pass haemophilia through the Y-chromosome.

Intracytoplasmic sperm injection
Explanation: Intracytoplasmic sperm injection is a specialized procedure to form an embryo in a laboratory in which a sperm is directly injected into ovum for fertilization to form a zygote.

Origin of replication (ori)
Explanation: Origin of replication (ori) is a sequence from where replication starts and any piece of DNA, when linked to this sequence, can be made to replicate within the host cells. This sequence is also responsible for controlling the copy number of the linked DNA.

Haemophilia and red green colour blindness
Explanation: Haemophilia and red-green colour blindness both are a sex-linked recessive gene on X chromosome. Body height is an example of polygenic inheritance. Rhesus blood group is base on the presence or absence of Rh-protein on the surface of RBC, phenylketonuria (PKU) is a recessive autosomal variation.

Jaintia Hills in Meghalaya
Explanation: The hotspot area includes all the seven districts, i.e. East Garo Hills, West Garo Hills, South Garo Hills, East Khasi Hills, West Khasi Hills, Jaintia Hills and Ri-Bhoi

Spirogyra
Explanation: Spirogyra is a filamentous alga. This alga does not fix atmospheric nitrogen. Anabaena, Nostoc, and Oscillatoria can heterocyst that can fix atmospheric nitrogen.

Point Q
Explanation: Point Q

Both of these
Explanation: Both of these

Phoenix dactylifera
Explanation: Phoenix dactylifera remained alive for longer period

Tropical rain forest
Explanation: Dead plant remains such as leaves, bark, flowers, and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. The tropical rain forest produces the highest biomass and hence produces the highest detritus. Hence the rate of decomposition is highest in the tropical rain forest.

Some amino acids as glycine and alanine
Explanation: In Urey and Miller's experiment, the product formed after the continuous sparking in the mixture of gases at high temperature were some amino acids like glycine and alanine. Sugar and nitrogenous base were also obtained from the same set up by some other scientist.