TS EAMCET Medical 2019 (8-May Shift-2)

Study the following regarding genic balance theory of sex determination in Drosophila
I. Organism with $\mathrm{AAA} \mathrm{XXX}$ is fertile triploid female
II. Organism with $\mathrm{AAA} \mathrm{XXY}$ is fertile triploid male
III. Organism with $\mathrm{AAA} \mathrm{XX}$ is an intersex
IV. Organism with $\mathrm{AA} \mathrm{XXY}$ is metafemale
Which of the above are correct?

Assertion (A): In human beings, the sex of the offspring depends on the type of sperm that fertilizes the ovum
Reason (R): Human males are heterogametic
The correct option among the following is

Colour blindness in human beings is

Identify the scientists who rediscovered the Mendel's result on the inheritance of characters.

A) de Vries
B) Morgan
C) von Tschermak
D) Sutton

The ratio of long-winged and vestigial winged Drosophila are formed when a pure long-winged (dominant) and a pure vestigial winged (recessive) Drosophila are crossed:

Assertion (A) : If the allele produces a less functional enzyme or non-functional enzyme the phenotype may be affected.
Reason (R) : The phenotype trait will not be dependent on the functioning of the unmodified allele.

The correct option among the following is:

Match the following:

The correct match is:

A woman (whose father is haemophilic and mother is homozygous normal) married a normal man and had two sons and two daughters. What are the chances of their sons being haemophilic?