EASY
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Grasshopper is an example of XO type of sex determination in which the males have _______.

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Important Questions on Heredity and Variation

HARD
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Explain the mechanism of 'sex determination' in birds. How does it differ from that of human beings?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Study the following regarding genic balance theory of sex determination in Drosophila
I. Organism with AAA XXX is fertile triploid female
II. Organism with AAA XXY is fertile triploid male
III. Organism with AAA XX is an intersex
IV. Organism with AA XXY is metafemale
Which of the above are correct?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Which of the following organisms produce sperm without involving meiosis?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
What is meant by royal jelly?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
In a certain taxon of insects (Example: Cockroach), some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosomes bearing organisms are _________
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Sterile female bees are
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Select the incorrect statement?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
The chromosomal type of sex determination In human beings is
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination

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

Question Image

EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
XO type of sex determination can be found in:
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
In which organism, female is XO and male is XX?
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
From the chromosomal complements given below, identify the one which shows female heterogamety.
HARD
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Discuss the role of chromosomes other than the sex-chromosome in the determination of sex.
HARD
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination

Explain the sex determination process in humans with the help of ray diagram.

HARD
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
How does sex determination take place in humans?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
How is sex determined in honeybee? 
EASY
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
In honeybees, sex determination and development occurs through
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination

Match the following:

  Karyotype of Drosophila   Sex
A) AA+XX I)  Metafemale
B) AA+XO II)  Female
C)  AA+XXX III) Intersex 
D) AAA + XXY IV) Metamale
    V)  Male

The correct match is

MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Haplo-diploid insects have diploid females from fertilized eggs but haploid males from unfertilized ones. Such a haploid male with red eyes is crossed with a white-eyed female. Assuming that the red-eye colour mutation is dominant over the white-eye colour, which one of the following statements is true?
MEDIUM
Biology>Genetics and Evolution>Heredity and Variation>Sex Determination
Select the incorrect statement.