1151. As a general rule interbreeding is possible between______________________?
comments icon0

A. Any two members of a Genus

B. Any two members of a Species

C. Any two members of an order

D. Any two members of a Family

1152. Under drought conditions, there is an increase in__________________?
comments icon0
A. All the above

B. Ethylene level

C. Abscisic acid

D. Pro line level

1153. In sunflower, production of foundation seed requires as isolation___________________?
comments icon0

A. 200 meters

B. 400 meters

C. 800 meters

D. 100 meters

1154. The term self incompatibility was coined by________________?
comments icon0
A. None of the above

B. East (1940)

C. Koelreuter (1763)

D. Gerstel (1950)

1155. Who gave the model of DNA_________________?
comments icon0

A. Dtanele

B. Koran

C. Watson and Crick

D. Tatum

1156. Anthesis starts in Allium cepa at___________________?
comments icon0

A. 5.00 pm

B. 3.00 pm

C. 7.00 am

D. 10.00 am

1157. Dispersal of seeds by parachute mechanism is present in__________________?
comments icon0

A. Onion

B. Tomato

C. Sorghum

D. Cotton
1158. Biometrics for the study of quantitative genetics was provided by ___________________?
comments icon0
A. Fisher

B. Mather

C. Hayman

D. Falconer

1159. A genetic element which can exist in more than one of the two alternative forms is known as__________________?
comments icon0
A. Episome

B. Disome

C. Mecrosome

D. Peroxisome

1160. Red (RR) is crossed with white (ww). All the (Rw) offsprings are pink this is an indication that the R gene is_________________?
comments icon0

A. Recessive

B. Mutant

C. Dominant

D. Incomplete dominant
1161. Cytoplasmic sterility is govemed by________________________?
comments icon0

A. Nuclear genes

B. Monoalleleic genes

C. Plasma genes

D. None of the above

1162. The term micro and macro environment was given by___________________?
comments icon0

A. Robinson (1948)

B. Comstock and Moll (1963)

C. Lemer (1954)

D. Perkins (1971)

1163. Dee-Geo-Woogen is the source of dwarfing gene in___________________?
comments icon0
A. Rice

B. Wheat

C. Maize

D. Sorghum

1164. Concept of combining ability as measure of gene action was first proposed by___________________?
comments icon0

A. Cavalli (1952)

B. Mather (1956)

C. Sprague and Tatum (1942)

D. Wright (1951)

1165. In cereals limiting amino acids are________________?
comments icon0

A. Methionine

B. Lysine

C. a and b

D. Threonine

1166. A healthy plant not selling seed may be due to____________________?
comments icon0
A. Male sterility

B. Female sterility

C. All the above

D. Self incompatibility

1167. Split gene was first reported in___________________?
comments icon0
A. Cluckens

B. Drosoplulla

C. All the above

D. Pea

1168. Erucic acid is found is_____________________?
comments icon0

A. Soybean

B. Mustard

C. Safflower

D. Til

1169. Where would you look for active cell division in a plant _____________________?
comments icon0
A. Tips of stem & roots

B. Cortex cells

C. Pith cells

D. Internodes regions

1170. Tea, coffee and mango seeds can not be converted in seed banks because they drastic loss in viability with decrease in moisture content below.___________________?
comments icon0

A. 20%

B. 12%

C. 15%

D. 18%

1171. If the frequency of a dominant phenotype in a stable population in 75% the frequency of the dominant allele in that population is____________________?
comments icon0

A. 40$

B. 25%

C. 50%

D. 75%

1172. Organism arise from existing forms by genetic variations is called_________________?
comments icon0

A. Hybridization

B. Genetics

C. Genetics

D. Mutation

1173. Ratio of additive variance to phenotypic variance is called___________________?
comments icon0

A. Co-heritability

B. Genetic gain

C. Heritability (broad sense)

D. Heritability (narrow sense)
1174. Heterobeltiosis is estimated over the___________________?
comments icon0
A. Better parent

B. Mid parent

C. Standard parent

D. Popular variety

1175. In a monohybrid cross, 2 heterozygous individuals were crossed, phenotypic ratio came to be (2:1), it is due to__________________?
comments icon0

A. Dominant lethal genes in heterozygous individuals

B. Dominant lethal genes in homozygous individuals

C. Dominant epistasis

D. None of the above

1176. Self pollination is associated with__________________?
comments icon0
A. Homogamy

B. Dichogamy

C. Chasmogamy

D. Herkogamy

1177. Who arrang the following associated with genetic engineering___________________?
comments icon0

A. Crick

B. Koruna

C. Watson

D. Morgan

1178. Edible part of orange is__________________?
comments icon0
A. Multicelled endocarpic hair

B. Unexcelled endocarp hair

C. Multicelled placental hairs

D. Unicelled placenta hairs

1179. Norine 10 is the source of dwarfing gene in________________?
comments icon0

A. Barley

B. Wheat

C. Rice

D. Oat

1180. Year 1900 was significant for geneticists due to__________________?
comments icon0
A. Rediscovery of Mendels

B. Discovery of gene

C. Principles of linkage

D. heredity theory

1181. Which one of the following does not contain both DNA and RNA__________________?
comments icon0

A. Bacterium

B. Fungus

C. Virus

D. Algae

1182. In Incern, resistance to spotted aphid is associated with__________________?
comments icon0

A. High DIMBOA in leaves

B. High silicant content

C. low sinigen in leaves

D. High saponin in leaves
1183. In a population gene frequencies remain constant when there is_________________?
comments icon0

A. Iubreeding

B. Selective mating

C. Out breeding

D. Random mating
1184. Specific combining ability is primarily a function of___________________?
comments icon0
A. All the above

B. Dominance x dominance epistasis

C. Dominance variance

D. Additive x dominance epistasis

1185. Concept of disruptive selection was first developed by__________________?
comments icon0

A. Thoday (1960)

B. Mather (9153)

C. Grafius (1965)

D. Falconer (1960)
1186. In cotton, jassids have non preference for______________________?
comments icon0

A. Fregobract

B. Okra leaves

C. Smoothness leaves

D. Hairiness of leaves
1187. Who gave the principle that man tends to multiply faster than food supply________________?
comments icon0

A. Haldane

B. Darwin

C. Mendel

D. Mathis
1188. Stadler, first used X-rays for induction of mutation in_________________?
comments icon0
A. Barley

B. Wheat

C. Maize

D. Oat

1189. Which are the necessary conditions for the hardy Weinberg principle for applying to genetic population________________?
comments icon0
A. High mutation ratio and small population

B. No migration and large population

C. Selective mating and small population

D. Low mutation population

1190. Concept of biparental mating was developed by__________________?
comments icon0

A. Jinks and Jones (1958)

B. Hayman (1958)

C. Comstock and Robinson (1948)

D. Perkins (1968)

1191. Reciprocal recurrent selection was proposed by___________________?
comments icon0

A. Allard (1955)

B. Hays and limner (1950)

C. Hull (1935)

D. Constock et al (1949)
1192. The spread of genes from one breeding population to another by migration which may result in changes in gene frequency is called__________________?
comments icon0

A. Gene frequency

B. Gene flow

C. None of the above

D. Genetic drift

1193. Mendel studied contrasting characters for his breeding cxperiments with peas which of the following character he did not study_______________?
comments icon0

A. Pod color

B. Pod shape

C. Plant height

D. Leaf shape
1194. Seeds which dried at low moisture content and stored at low temperature without losing their viability are__________________?
comments icon0

A. Active seeds

B. Orthodox seeds

C. Recalcitrant seeds

D. Certified seeds

1195. Ieucaena lencocephala is a popular tree for______________________?
comments icon0

A. Seasonal fruit

B. Beautification

C. Nutritive forage

D. Medicinal plant

1196. A heterogeneous population include_______________?
comments icon0

A. Synthetic

B. Composites

C. Multi lines

D. All the above
1197. germplasm which is meant for short term storage (3 to 5 years) is known as___________________?
comments icon0

A. Exotic collection

B. Working collection

C. Indigenous collection

D. None of the above

1198. Mendel was lucky to use pea plants for genetical experiments because__________________?
comments icon0

A. They showed one type of flowers

B. The seven characters he studied were on different chromosomes

C. they belong to the family leguminous

D. They have round seeds with lot of proteins

1199. Convergent improvement was proposed by________________?
comments icon0

A. East (1920)

B. Jones (1920)

C. Hays (1919)

D. Richy (1920)
1200. In line x tester cross each male is crossed with____________________?
comments icon0

A. Different sets of females

B. Same sets of females

C. All the above

D. Few females in a set