Theory of pangenesis was given by
Darwin
Lamarck
Hugo de Vries
Oparin
A.
Darwin
Darwin proposed the theory of pangenesis to explain the inheritance of characteristics from parents to offsprings. According to this theory, every somatic cell produces gemmules and the actual germ cells are the sites of a collection of gemmules coming from different somatic
cells.
In human, during fertilization, a sperm firstly comes in contact with which layer of the ovum
Zona pellucida
Vitelline membrane
Jelly coat
Zona radiata
Darwinism explains all the following except
Within each species, there are variations
Organisms tend to produce more number of offspring that can survive
Offspring with better traits that overcome competition are best suited for the environment
Variations are inherited from parents to offspring through genes
The protein α-1 antitrypsin is used to treat which of the following disease?
Cancer
Rhematoid arthritis
Emphysema
ADA deficiency disease in children
Which one of the following in birds indicates their reptilian ancestry?
Scales on their hindlimbs
Four-chambered heart
Two special chambers crop and gizzards in their digestive tract
Egg with a calcareous shell
Darwins finches represent
Morphological variations
Geographical isolations
Climate variations
Reproductive isolation
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and
Evolution
Limiting factors
Saltation
Natural selection
Which statement is correct for bacterial transduction?
Transfer of some genes from one bacteria to another bacteria through virus
Transfer of genes from one bacteria to another bacteria by conjugation.
Bacteria obtain DNA directly
Bacteria obtain DNA from other external sources
The vector for T-DNA is
Thermus aquaticus
Salmonella typhimurium
Agrobacterium tumefaciens
Escherichia coli
