Biology for ( Grade 10 )

kill them. They also include contraceptive pills which inhibit secretion of F.S.H. and L.H. ovulation is inhibited. (D) Mechanic ...

(A) ovary (B) uterus (C) vagina (D) fallopian tube The process of reproduction which involves only a single parent to form an ...

SUBJECTIVE QUESTIONS SHORT ANSWER TYPE QUESTIONS Why regeneration is considered to be a method of reproduction? When an organis ...

Que. 1 2 3 4 5 6 7 8 9 10 Ans. C D C A B B B B A C DAILY PRACTIVE PROBLEMS # 12 Que. 1 2 3 4 5 6 7 8 9 10 Ans. D D D B A C B C A ...

HEREDITY & INHERITANCE BL-13 13.1 HEREDITY : In includes those traits or characters which are transmitted from generation to ...

blastogenic variation. Somatic variations are due to : (A) Environment : This includes the factors that affect the organisms su ...

Germinal variation could be of two types : (A) Continuous variations : [Fluctuating variations] The continuous variations are v ...

These include Bacteria, Amoeba, Euglenas, fungi etc. many plants such as rose and sugarcane, lower animals namely Hydra, planari ...

13.4 (A) Earlier Views of Heredity : Different theories have been put forward to explain in what physical form the traits pass f ...

presence of the characters of both the parents. Mendel was the first to give the particulate theory of heredity. He had experime ...

Back cross : The cross between F 1 generation with any of the parents is known as back cross. Test cross : The cross between ...

stigma should be receptive. Emasculation Bagging [for protection] Dehiscence [by dusting pollens] Pollination (i) Traits choosen ...

(ii)Mendel performed experiments in three stages : (A)he made sure that, the plant which he had choosen must be true breeding pl ...

t Tt Tt t Tt tt In F 1 all are tall (F 1 ÏF 1 ) T t T TT Tt t Tt Tt In F 2 we will get 3 : 1 ratio. Homozygous tall : Heterozygo ...

(C) Mendel further found that the phenotypic ratio of 3 : 1 of dominant to recessive form of a trait was actually a genotypic ra ...

pair of contrasting factors or genes or allels are brought together in a heterozygous condition, the two remains together withou ...

yr yr YR YyRr YyRr YR YyRr YyRr All F 1 plants are yellow and round seeded YR Yr yR yr YR YYRR Yyrr YyRR YyRr Yr YYRr Yyrr YyRr ...

13.9 (a) Molecular Structure of Gene : Chemically gene is formed of DNA. If consists of following parts : (i) Recon : It is the ...

DAILY PRACTIVE PROBLEMS # 13 OBJECTIVE QUESTIONS When a red flower homozygous pea plant is crossed with a white flower plant wh ...

(A) 3 : 1 (B) 1 : 2 : 1 (C) 2 : 1 (D) 9 : 3 : 3 : 1 Branch of biology deal s with heredity and variation is called (A) Palaento ...