Select the incorrect statement:

1.	Human males have one of their sex-chromosome much shorter than the other.
2.	Male fruit fly is heterogametic.
3.	In male grasshoppers, 50% of sperms have no sex chromosome.
4.	In domesticated fowls, the sex of progeny depends on the type of sperm rather than the egg.

What map unit (Centimorgan) is adopted in the construction of genetic maps?

What is the genetic disorder in which an individual has an overall masculine development gynaecomastia, and is sterile?

In Antirrhinum (Snapdragon), a red flower was crossed with a white flower and in F₁ generation, pink flowers were obtained. When pink flowers were selfed, the F₂ generation showed white, red, and pink flowers. Choose the incorrect statement from the following:

Match the items of Column - I with Column - II :

Select the correct option from the following:

In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?

1. I^A i (Male) ; I^B I^B (Female)

2. I^A I^A (Male) ; I^B I^B (Female)

3. I^A I^A (Male) ; I^B i (Female)

4. I^A i (Male) ; I^B i(Female)

In which genetic condition, each cell in the affected person, has three sex chromosomes XXY?

1. Thalassemia

2. Klinefelter's Syndrome

3. Phenylketonuria

4. Turner's Syndrome

The production of gametes by the parents the formation of zygotes, the F₁ and F₂ plants can be understood using

Experimental verification of the chromosomal theory of inheritance was done by:

Select the correct match: