IGCSE Cambridge Secondary Grade 9 Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1 By definition an allele is ?

(A) The alternative from of a gene.	(B)Different gens representing different characters.
(C)Different gene representing one character.	(D)Genes which express in the F1

Question-2 Centromere is required for

(A) Transcription	(B)Crossing over
(C)Cytoplasmic cleavage.	(D)Movement of chromosome towards poles.

Question-3
Human blood group is an example for

(A) Point mutation	(B) Multipleallelism
(C) Pleiotropy	(D) Chromosomal aberration

Question-4 Crossing over that result in genetic recombination in higher organisms occur between ?

(A) Sister chromatids of bivalent .	(B)Non- sister chromatids of a bivalent.
(C)Two daughter nuclei	(D)Two different bivalent.

Question-5
The contrasting pairs of factors in Mendelian crosses are called.

(A) Multiple alleles	(B) Allelomorphs
(C) Alleri	(D) Para morphs.

Question-6 Mono hybrid test cross ration is?

(A) 3: 1	(B)1: 2: 1
(C)1: 1	(D)9 : 3: 1

Question-7
Which of the following characters studied by Mendez in garden pea found to be dominant?

(A) Green seed co lour	(B) Terminal flower position
(C) Green pod colour	(D) Crinkled deed.

Question-8 Cross between hybrid and recessive parent is

(A) Back cross	(B)Test cross
(C)Mono hybrid	(D)Di hybrid

Question-9 A women with chromosome due to three copies of chromosome 21 is characterized by

(A) Down syndrome	(B)Triploidy
(C)Tunersyndrom	(D)Super femaleness

Question-10
First geneticist( father of genetics) was.

(A) De vries	(B) Mendel
(C) Darwin	(D) Morgan

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