plant breeding and genetics Mcqs
101. Gradual reduction on genetic variability due to elimination of various () is called_______________________?
comments icon0

A. Land races

B. Genetic diversity

C. Centers of diversity

D. Genetic erosion
102. Allogamy is promoted by____________________?
comments icon0

A. Male sterility

B. Dichiny

C. Herkogamy

D. All the above
103. A gene which exhibits higher mutation rate than others is referred as___________________?
comments icon0

A. Mutator gene

B. Antimutalor gene

C. Mutable gene

D. Hot spot

104. Red flower pea plant is crossed with the white flowered pea plant, F1 is red; with flower color is ______________________?
comments icon0
A. Recessive

B. Unexpressive

C. Dominant

D. Non-genetic

105. Heat, cold and frost resistance ideotype have been developed in_____________________?
comments icon0
A. None of the above

B. Cereals

C. Millet

D. Pulses

106. Rum is distilled from____________________?
comments icon0

A. Unmalted cereals

B. Unmalted potatoes

C. Unrefined products of sugarcane

D. Fermented fruit juice

107. When pollination and fertilization occur in unopened flower bud it is known as__________________?
comments icon0

A. Hamogamy

B. All the above

C. Chasmogamy

D. Cleistogamy
108. The term mitosis was coined by__________________?
comments icon0

A. Rimpu (1890)

B. Nilson (1900)

C. De Vilmorin (1856)

D. Flemming (1882)
109. Genetic selection was proposed by_________________?
comments icon0

A. Hull (1945)

B. Stadler (1944)

C. Richy (1927)

D. East (1920)

110. Concept of generation means analysis was developed by_______________________?
comments icon0

A. Kempthome (1957)

B. Hayman (1958)

C. Griffing (1965)

D. Jink (1950)

111. In green vegetables, the limiting amino acids is__________________?
comments icon0

A. Lysine

B. Arginine

C. Methionine

D. Trytophan

112. Primitive cultivars which are selected and cultivated by farmers for many years are___________________?
comments icon0
A. Land races

B. Modern cultivars

C. Obsolete cultivars

D. teriary gene pool

113. Seeds which dried at low moisture content and stored at low temperature without losing their viability are__________________?
comments icon0

A. Recalcitrant seeds

B. Orthodox seeds

C. Certified seeds

D. Active seeds

114. Concept of ideotype was coined by__________________?
comments icon0

A. Oat

B. Rice

C. Sorghum

D. Wheat
115. In forage, crops, ideal plant type consists of ______________________?
comments icon0

A. Late resistance to disease

B. Dwarf, late green

C. Tall, leafy, high leaf/stem ratio

D. Dwarf stature

116. Plasmids are discovered by___________________?
comments icon0

A. Beadle & Tatum

B. Watson & Crick

C. None of the above

D. Iscki & Sakai
117. Concept of path coefficient analysis was given by_________________?
comments icon0

A. Smith (1936)

B. Wright (1921)

C. Mather (1949)

D. Fisher (1918)

118. Gamatophytic system of self incompatibility was first discovered by____________________?
comments icon0

A. Bresbaker (1958)

B. East and Mangelsdref (1925)

C. Frankel (1977)

D. Hughes and Babceek

119. Self pollination is associated with__________________?
comments icon0

A. Herkogamy

B. Dichogamy

C. Chasmogamy

D. Homogamy
120. Difference between mean phenotypic value of the progeny of selected plants and the parental population is known as__________________?
comments icon0

A. Coheritability

B. Genetic advance

C. Genetic gain

D. Heritability

121. Self incompatibility in which the genes express in the style is known as__________________?
comments icon0
A. Styler SL

B. Diallelic SL

C. Ovarian SL

D. Polyallelic SL

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

A. Robinson (1948)

B. Perkins (1971)

C. Comstock and Moll (1963)

D. Lemer (1954)

123. Dispersal of seeds by parachute mechanism is present in__________________?
comments icon0
A. Cotton

B. Sorghum

C. Tomato

D. Onion

124. Drought tolerance is associated with ____________________?
comments icon0

A. Small waxy and thick leaves

B. Sunken, small and less stomata

C. All of the above

D. Deep root system

125. Global gene bank of barley is located at__________________?
comments icon0
A. ICARDA

B. Florida

C. CIP

D. ICRISAT

126. In the long term storage, germplasm can be stored upto____________________?
comments icon0
A. 100 years

B. 200 years

C. 150 years

D. 1250 years

127. Global gene pool rice is maintained at_________________?
comments icon0

A. China

B. Mexico

C. None of the above

D. IRRI Philippines
128. Diocious plant is____________________?
comments icon0

A. Datepalm

B. Hemp

C. All the above

D. Papaya

129. In line x tester cross each male is crossed with____________________?
comments icon0

A. Few females in a set

B. Different sets of females

C. All the above

D. Same sets of females
130. Gene pool consist of____________________?
comments icon0
A. All the above

B. Modern cultivars

C. Advanced breeding materials

D. Land race

131. Ratio of genotypic covariance to the phenotypic covariance is____________________?
comments icon0

A. Heritability (b.s)

B. Genetic gain

C. Genetic advance

D. Co-heritability
132. Germplasm collected within the country is known as____________________?
comments icon0

A. Working collection

B. Exotic collection

C. Active collection

D. Indigenous collection
133. In rice, brown plant hopper has no preference for___________________?
comments icon0

A. Low aspergine

B. Purple stigma

C. Red pericarp

D. All the above
134. Which generate variability_________________?
comments icon0

A. None of the above

B. Peleiotropy

C. Mitosis

D. Meiosis
135. Vertical resistance is also known as_________________?
comments icon0

A. Oligogenic

B. All the above

C. Race specific

D. Qualitative

136. Single seed descent method was first suggested by_________________?
comments icon0

A. Brim (1966)

B. Simmonds (1979)

C. Goulden (1939)

D. Giber (1953)

137. International institute for Tropical Agriculture is located at______________________?
comments icon0

A. Syria

B. Columbia

C. Nigeria

D. Mexico

138. Protein content in barely is higher than____________________?
comments icon0
A. maize

B. None of the above

C. wheat

D. rice

139. Disease and insect resistance is governed by________________?
comments icon0

A. Polygenes

B. All the above

C. Plasma genes

D. Oligogenes

140. germplasm which is meant for short term storage (3 to 5 years) is known as___________________?
comments icon0

A. None of the above

B. Working collection

C. Exotic collection

D. Indigenous collection

141. The term homeostasis was coined by_____________________?
comments icon0

A. Freeman (1971)

B. Jinks (1968)

C. Warner (1952)

D. Lemer (1954)
142. The term heterosis was coined by____________________?
comments icon0
A. Shull (1914)

B. Hull (1945)

C. Bruce (1910)

D. East (1908)

143. Reciprocal recurrent selection was proposed by___________________?
comments icon0
A. Constock et al (1949)

B. Hays and limner (1950)

C. Allard (1955)

D. Hull (1935)

144. The concept of diallel selective mating was developed by____________________?
comments icon0

A. brim (1966)

B. Russel (1978)

C. Jensen (1970)

D. Jensen (1952)

145. In populations genotypic and phenotypic ratios are identical in cases of___________________?
comments icon0

A. Mendelian dihybrid

B. None of the above

C. Incomplete dominance

D. Mendel lan monohybrid

146. When red tall plant is crossed with dwarf white plant all the plants of F, are found to be tall red. which of the following ratio will be available when a test cross is made_________________?
comments icon0

A. 1:02:03

B. 3:01

C. 1:1:1:1

D. 1:02:01

147. How many type of DNA are_________________?
comments icon0

A. 4

B. 2

C. 3

D. 6

148. The functional unit of mutation is___________________?
comments icon0

A. Gaston

B. Recon

C. Gene

D. Mouton

149. Sugar present in DNA is_______________?
comments icon0

A. Heptose

B. Pentose

C. Hexose

D. Triose

150. The maximum magnification possible within electron microscope is____________________?
comments icon0

A. 2000 times

B. 200,000 times

C. 400,000 times

D. 4000 times