Which of the following statements about sex linked traits is not correct?
male inherit sex linked traits from thier fathers
sex linked traits are more common in males
females can be carriers beacuse they can be heterozygous for the trait
males are never carriers since they only recieve one sex chromosome
Correct answer is D
No explanation has been provided for this answer.
Which of the following statements best describes a test cross?
to determine the genotype of an individual whose phenotype is to be known
to determine the phenotype of an individual whose genotype is known
between the progeny of parents to ascertain external expressions
between two homozygous recessive individuals to confirm the genotypes
Correct answer is C
No explanation has been provided for this answer.
Individuals belonging to the blood group O are universal donors because ?
antigens are absent in thier blood cells
members of the group consitutute the highest number of humans
there are no of antibodies in thier blood plasma
the antigens in thier blood cells are easily destroyed
Correct answer is A
No explanation has been provided for this answer.
Which of the followig traits in humans is an example of physiological variation?
skin colour
fingerprint
tongue rolling
height
Correct answer is C
No explanation has been provided for this answer.
An accident victim was successfully transfused with blood from the father whose blood group is
B
O
AB
A
Correct answer is C
No explanation has been provided for this answer.
The use of a lighter instead of matchsticks is a way of conserving
petroleum
forest
water
wildlife
Correct answer is B
No explanation has been provided for this answer.
The use of a lighter instead of matchsticks is a way of conserving
petroleum
forest
water
wildlife
Correct answer is A
No explanation has been provided for this answer.
The burning of farmlands ahould be discouraged because?
destroys organic components of the soil
increases population of wild animals
increases dormancy period of some seeds
destroys some plant seeds
Correct answer is A
No explanation has been provided for this answer.
The conservation of natural resources is enhanced by the following practices except
controlling farm activities
protecting endangered species
poaching in game reserves
establishing parks and gardens
Correct answer is C
No explanation has been provided for this answer.
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