In which of the following male heterogamety is not observed?

(1) Insects

(2) Birds

(3) Humans

(4) (1) and (2)

Subtopic:  Sex Determination: Further Considerations |
 78%
From NCERT
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In which of the following female heterogamety is not observed?

(1) Insects

(2) Birds

(3) Humans

(4) (1) and (3)

Subtopic:  Sex Determination: Further Considerations |
 79%
From NCERT
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Which of the following matches is wrong?

(1) Birds- ZZ(male)- ZW(female)

(2) Drosophila- XY(male)- XX(female)

(3) Humans- XY (male), XX (female)

(4) Cockroach- - XZ(male)- ZZ(female)

Subtopic:  Sex Determination: Further Considerations |
 87%
From NCERT
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Which of the following statement is correct with respect to human sex determination?

(1) The genetic makeup of egg determines the sex of child.

(2) Female produces two types of ovums and males produce only one type of sperm.

(3) Each pregnancy has more probability of male child than of female.

(4) Out of 23 pairs of chromosomes, 22 are same both in males and females.

Subtopic:  Sex Determination |
 91%
From NCERT
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Mutation causes

(1) alterations at protein level

(2) changes in genotype only

(3) changes in phenotype

(4) both (2) and (3)

Subtopic:  Mendelian Disorders |
 86%
From NCERT
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Sickle cell anaemia is a classic example of

(1) Point mutation

(2) silent mutation

(3) Frame shift mutation

(4) non sense mutation

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
 92%
From NCERT
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In which of the following one may observe variation in DNA?

(1) Fragmentation

(2) Budding

(3) Amitosis

(4) mutation

Subtopic:  Mendelian Disorders |
 95%
From NCERT
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If a normal female has a sickle cell anaemic child what can be the probable genotype of that gene in that female?

(1) AA

(2) aa

(3) Aa

(4) both (1) and (3)

Subtopic:  Mendelian Disorders: Sickle Cell Anemia |
 65%
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If the female has three boys in her first three pregnancy. What are the chances of getting female child this time?

(1) 25%

(2) 50%

(3) 75%

(4) 20%

Subtopic:  Dihybrid Cross: Details |
 88%
From NCERT
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If a haemophilic female who marries a normal male gives birth to a male child, then what are the chances of boy being normal? (a hypothetical situation but it won’t happen practically)

 (1) 0%

 (2) 50 %

 (3) 25%

 (4) 75%

Subtopic:  Mendelian Disorders: Hemophilia |
 72%
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