Isogamy ( two fusing gametes are similar )

Anisogamy( two fusing gametes are dissimilar)

In the above sentences what is meant by similar and dissimilar?

Dear student.

Here similar means similar morphology i.e same size and shape. Dissimilar means different shape and size.

Please refer the link below: 

https://www.meritnation.com/ask-answer/question/what-is-anisogamy-with-example/human-reproduction/5681274  

Regards.