Tamil Nadu (English Medium) Plus 1 Biology Science Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1
In case of incomplete dominance, what will be the phenotypic ratio of F₂ generation ?

(A) 3 : 1	(B) 1 : 2 : 1
(C) 1 : 1 : 1 : 1	(D) 2 : 2

Question-2 How many pairs of contrasting characters in pea plant are chosen by Mendel?

(A) 2	(B)3
(C)4	(D)7

Question-3
In which one of the following , complementary gene interaction ratio of 9 : 7 is observed ?

(A) Fruit shape in Shepherd's purse	(B) Coat colour in mouse
(C) Feather colour in fowl	(D) Flower colour in pea

Question-4 The transmission of certain genetic information from parents to offsprings through cytoplasm is termed as

(A) transformation	(B)transduction
(C)transversion	(D)cytoplasmic inheritance

Question-5
The gene, which controls many characters is called

(A) codominant gene	(B) poly gene
(C) pleiotropic gene	(D) multiple gene

Question-6
Genes exhibiting multiple effects are known as

(A) complementary genes	(B) pleiotropic genes
(C) cistrons	(D) pseudogenes

Question-7 Which of the following is a recessive trait in garden pea?

(A) tall stem	(B)round seeds
(C)wrinkled seeds	(D)coloured seed coat

Question-8 An incomplete dominance is known by

(A) Pissum sativum	(B)Lathyrus odoratus
(C)Mirabilis jalapa	(D)Neurospora crassa

Question-9 The organisms phenotypically similar but genotypically different are said to be

(A) multizygous	(B)homozygous
(C)heterozygous	(D)monozygous

Question-10 In F₂-generation, how many types of seeds were obtained by Mendel in his original work?

(A) One type	(B)two types
(C)four types	(D)seven types

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Plus 1 Biology Science

Tamil Nadu (English Medium)

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