Chiasmata firstly seen in
Leptotene
Zygotene
Pechytene
Diplotene
Ischihara chart is used to detect
Preformation theory concerning transmission of characters was given by
Match the columns :
Column $I$ |
Column $II$ |
$(1)$ Lethal mutation | $(a)$ Mutation caused by external factors |
$(2)$ Spontaneous mutation | $(b)$ They are metabolic errors |
$(3)$ Induced mutation | $(c)$ As a result the mutant dies |
$(4)$ Biochemical mutation | $(d)$ Most of the mutations occurs in nature are of this type. |
Which one of the following conditions of the zygotic cell would lead to the birth of a normal human female child ?
What is the other name for "incomplete dominance''