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
Lack of independent assortment of two genes 'A' and 'B' in fruit fly Drosophila is due to

(A) repulsion	(B) recombination
(C) linkage	(D) crossing over

Question-2 The organisms phenotypically similar but genotypically different are said to be

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

Question-3 The polygenic genes show different

(A) genotypes	(B)phenotypes
(C)karyotypes	(D)none of these

Question-4
Genes exhibiting multiple effects are known as

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

Question-5
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-6
Which of the following is best suited for codominance ?

(A) Both are recessive	(B) Both are dominance
(C) One is recessive	(D) One is dominance

Question-7 The 1 : 2 : 1 ratio among pink flowers indicates the phenomenon of

(A) linkage	(B)dominance
(C)dihybrid cross	(D)incomplete dominance

Question-8 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-9 An incomplete dominance is known by

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

Question-10 If a cross between two plants have 50% tall and 50% dwarf progeny, then the parents genotypes are

(A) Tt × Tt	(B)Tt × tt
(C)TT × tt	(D)TT × Tt

Click here to see your answersheet and detailed track records.

Plus 1 Biology Science

Tamil Nadu (English Medium)

Practice in Related Chapters
Cell Biology
Biodiversity
Genetics
Plant Morphology
Plant Physiology
Reproductive Biology
Environmental Biology