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In a certain taxon of insects, some have 17 chromosomes, and the others have 18 chromosomes. The 17 chromosome-bearing organisms are males or females?

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Important Questions on Sex Determination

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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Describe the chromosomal basis of sex determination in humans, honeybees and birds.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
In honeybee, the process of male bee without fertilization is termed as Swarming.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Write a note on queen bee?
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Explain the process of sex determination in human beings diagrammatically.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination

In which of the organism, the following type of sex determination is possible

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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
In honeybees, females are ___i____     having ___ii___     chromosomes and males are ___(iii)___ having ___iv___     chromosomes.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination

Bird females have chromosome arrangement as

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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
A couple has six daughters, what is the possibility of their having a girl next time?
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Number of autosomes present in liver cells of a human female is
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
_____ is a prenatal test in which amniotic fluid is taken for the diagnosis of chromosomal abnormalities and fetal infections as well as for sex determination.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
In the XX-XO type of sex determination
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
A mother in a family of five daughters is expecting her sixth baby. The chance of its being a son is ___.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination

Which of the following organisms have similar sex chromosomes?

(A) Female bird.

(B) Male Drosophila.

(C) Female human.

(D) Female grasshopper.

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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
How many chromosomes are present in an unfertilized egg
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Select the correct statements regarding honey bees.
(i) The queen bee and the worker bees develop from fertilised eggs and are sexually females.
(ii) Males (drones) develop parthenogenetically from unfertilised eggs.
(iii) Queen bee feeds upon royal jelly and the worker bees feed upon bee bread.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
The chromosomes in human males and females are represented as _____ and _____.
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
Which of the following organisms show heterogametic nature in one of their sex?
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination
In man, the usual number of chromosomes is:
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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination

Read the following statements and select the correct option:

A. In honeybee, males do not have father and thus, cannot have sons but have a grandfather and can have grandsons.

B. In birds, sperm determines the sex of the offspring.

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Biology>Genetics and Evolution>Sex Determination>Mechanisms of Sex Determination

Identify the boxes labelled A, B and C w.r.t. honeybee:

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