Tag: determination of sex
Questions Related to determination of sex
Choose the correct answer from the alternatives given.
A couple has six daughters, What is the possibility of their having a girl next time?
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10%
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50%
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90%
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100%
The possibility of having a girl or boy child is equal Le., 50% as 50% male gametes are Y type and 50% are X type. Fusion of egg with X type sperm will produce a girl child.
If the first seven children born to a particular pair of parents are all males, what is the probability that the eighth child will also be a male?
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$\dfrac{1}{2}$
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$\dfrac{1}{4}$
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$\dfrac{1}{8}$
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$\dfrac{1}{16}$
In human beings, the gametes from the .......... decides the sex of the baby.
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Male parent
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Female parent
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Both A and B
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None of the above
A son inherits an X chromosome from
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Mother
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Father
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Both A and B
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Grandparents
A child who inherits an Y chromosome from father will be a girl.
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True
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False
Mother is responsible for the sex of a baby.
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True
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False
The sex of the child is completely dependent on the father and not mother. This is because men are XY and women are XX. This means that the woman can only donate one X chromosome to her child, while the father can either donate an X or a Y. If the father donates the X to the child, it will be XX and become a female, if the father donates a Y to the child, it will be XY and will become a male.
The sex chromosomes of .......... determine the sex of an unborn baby.
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Male
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Female
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Grand parent
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None of the above
The given statement is true or false. Sex of baby mainly depends on male.
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When X chromosome containing sperm fuses with ovum, male foetus develops.
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When Y chromosome containing sperm fuses with ovum, male foetus develops.
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When X chromosome containing sperm fuses with ovum, female foetus develops.
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Both B and C
The chromosome in the human female is XX while that in the male is XY.
If a sperm carrying X chromosome fertilizes an ovum or egg, which carries X chromosome, then the child born will be a girl (female). This is because the child will have XX combination of sex chromosomes.
If a sperm carrying Y chromosome fertilizes an ovum, which carries X chromosome, then the child will have XY combination of sex chromosome and hence it will be a male child.
Thus, the correct answer is the option (D), 'Both B and C.'.
A zygote which has inherited a Y chromosome from the father will develop into
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A boy
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A girl
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Anyone of the above
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None of the above
XY type of sex determination is seen in humans. Genetic makeup of female is XX and that of male is XY. A female ovum always carries a X chromosome and male sperm can carry either X or Y chromosome.
The human which has an XX pair of chromosomes is called
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Male
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Female
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Hybrid
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Pure breed
Humans have X and Y sex chromosomes. A human with 22 pairs of autosomes and two copies of X chromosomes as sex chromosomes are females while those with 22 pairs of autosomes and XY chromosomes as sex chromosomes are males. A pure breed refers to individual that have a pair of identical alleles for a particular locus while a hybrid carries unlike alleles for a particular locus. The correct answer is B.