Ø  The ability of a gene or gene combination to be expressed phenotypically to any degree is called Penetrance.

Ø  The ability of a plant to complete its life cycle before serious soil and plant water deficit occurs is referred to —Drought escape.

Ø  The absence of functional pollen grains in otherwise hermaphrodite flowers is called as — male sterility.

Ø  The additional chromosome in a telocentric chromosome is known as — Telocentric trisomics.

Ø  The agents that cause the mutation are termed as – Mutagens.

Ø  The All India Coordinated Maize Improvement Project was started in – 1957.

Ø  The amount of DNA present in the haploid genome of an organism is known as – C-value.

Ø  The appearance of individuals in F2 with very higher or lower intensity of expression than their both parents is known as — Transgressive segregation

Ø  The basic chromosome number is 2x.

Ø  The basic structural unit of chromatin— Nucleosome.

Ø  The both Asian rice and African rice arise from a common parent — O. Perennis.

Ø  The cell theory was given by Schleiden and Schwann.

Ø  The change in total DNA amount due to repeated DNA sequences of heterochromatin results in—Evolution.

Ø  The characteristic fruit of the family Poaceae Caryopsis.

Ø  The chemicals used for chemically induced male sterility are called — Male Gametocides.

Ø  The chiasma becomes clearly visible at which phase Diplotene.

Ø  The chromosome in which both arms are identical Isochromosome.

Ø  The chromosome rearrangement involving the exchange of chromosome segments between two chromosomes that do not belong to the same pair of chromosomes is referred to Reciprocal translocation.

Ø  The chromosome that has lost one of its arms and replaced it with an exact copy of the other arm is called as Isochromosome.

Ø  The chromosome that is darkly stained at interphase Heterochromatin.

Ø  The chromosome that is lightly staining at interphase Euchromatin.

Ø  The concept of operon was given by Jacob and Monad.

Ø  The conservation of germplasm under natural conditions is referred to as — In situ conservation.

Ø  The crossing over take place in meiosis at which phase — Pachytene.

Ø  The degree of phenotypic expression of a gene in the different individuals is known as Expressivity.

Ø  The degree to which a genotype is expressed phenotypically is called — Expressivity.

Ø  The development of embryo sac from a megaspore is known as Megagametogenesis.

Ø  The development of haploid embryos/plantlets from pollen grains is termed as Androgenesis.

Ø  The development of the embryo is called Embryogenesis.

Ø  The differences among individuals of a single species for a particular character's is called as Variation.

Ø  The Division of cytoplasm is called as Cytokinesis.

Ø  The Division of nucleus is called as Karyokinesis.

Ø  The DNA show negative charge due to— Phosphate group.

Ø  The dominance hypothesis was first proposed by — Davenport (1908).

Ø  The dominant allele at one locus mask the expression of both dominant and recessive alleles at another locus are known as Dominant epistasis.

Ø  The dominant alleles at either of the two loci mask the expression of recessive alleles at the two loci are known as Duplicate dominant epistasis.

Ø  The donor parent used only once in the backcross programme is known as Non- recurrent parent.

Ø  The dwarfing genes in the wheat– NORIN-10.

Ø  The each trait separates independently of each other Law of Independent Assortment.

Ø  The ear-to-row method was developed by – Hopkins (1908).

Ø  The effective method to obtain autopolyploids is Colchicine.

Ø  The embryo develops directly from haploid nuclei other than egg cells are known as Apogamy.

Ø  The embryo develops directly from the somatic cell are known as Apospory.

Ø  The embryo develops from egg cell is called as Parthenogenesis.

Ø  The evidence for semiconservative replication of DNA.

Ø  The evidence for semiconservative replication of DNA was first presented by – Meselson and Stahl in 1958.

Ø  The exchange of strictly homologous segments between non sister chromatids of homologous chromosomes is called as — Crossing over.

Ø  The existence of more than two alleles at the same locus of a homologous chromosome is referred to as - Multiple  alleles.

Ø  The failure of pollen to fertilize the same flower or other flowers on the same plant are known as — Self incompatibility.

Ø  The fibers are separated by stem through the process called as Retting.

Ø  The first autopolyploid variety released for general cultivation in India is — Pusa Giant Berseem.

Ø  The first visible step in nuclear division in mitosis is  Prophase.