Question

Which among the following is a similarity shared by all the pre-Mendelian concepts?
(a)Blending nature of inheritance units
(b)The resemblance of heterozygous offspring with parent
(c)Particular nature of inheritance unit
(d)Absence of blending of alleles of a gene

Answer 1

Hint: It is concerned with the transmission, expression, and evolution of genes, the molecules that control the function, development, and ultimate appearance of individuals. Particular sorts of two or more traits may occur together in one generation and separate in subsequent generations.

Complete answer
Blending Inheritance suggests that traits from both mother and father blend or mix with one another and therefore the offspring acquire these blended traits. There are the quantities of pre-Mendelian hypotheses that followed the blending inheritance concept and objects the Mendelian hypothesis. Different choices are in accordance with the Mendelian hypothesis.

Additional information
A number of viewpoints were suggested before Mendel to elucidate the transmission of characters from parents to offspring. They are frequently called speculations of blending inheritance as they accepted that parents blended or got blended during their transmission to posterity.
1. Moist Vapour Theory
Pythagoras (580-500 B.C.) believed that each organ of the body male-produced moist vapors during coitus which formed the body parts of the embryo.
2. Fluid Theory
Empedocles (504-433 B.C.), the supporter of the pounder of four humor hypotheses, suggested that each body part created a liquid. The fluid of various body parts of the 2 parents mixes up and is employed within the formation of the embryo.
3. Reproductive Blood Theory
Aristotle (384-322) imagined that the guys produce profoundly cleansed conceptive blood containing the supplements from all body parts. Females also produce reproductive blood but this is impure.
4. Preformation Theory
The hypothesis of preformation accepts that the creature is as of now present, i.e., performed inside the sperm or egg during a small structure called a homunculus.
Fertilization is required to stimulate growth.

So the correct answer is ‘Blending nature of inheritance units’.

Note:
The basic feature of inheritance
1. Traits have alternate forms.
2. Traits are represented within the individuals by discrete particulate entities which don't get blended or modified.
3. One alternate of a trait could also be exhibited more often than the opposite.
4. A substitute kind of an attribute may stay covered up for at least one age at that point and return inside the unaltered state.
5. Out of the two alternate traits present together in an individual, only one is expressed.