When there is one extra chromosome due to non- disjunction, it is called trisomy. In such a case, the gamete has one extra chromosome of a homologous pair. In Jacob's syndrome, the extra chromosome is present in Ox chromosome OY chromosome O chromosome number 13 chromosome number 18

When there is one extra chromosome due to non- disjunction, it is called trisomy. In such a case, the gamete has one extra chromosome of a homologous pair. In Jacob's syndrome, the extra chromosome is present in Ox chromosome OY chromosome O chromosome number 13 chromosome number 18

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter20: Chromosomes And Human Genetics

Section: Chapter Questions

Problem 7SQ: A gamete affected by nondisjunction could have __________. a. a change from the normal chromosome...

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Concept explainers

Oogenesis

The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.

Cell Division

Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:

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When there is one extra chromosome due to non-
disjunction, it is called trisomy. In such a case, the
gamete has one extra chromosome of a homologous
pair. In Jacob's syndrome, the extra chromosome is
present in
O x chromosome
O Y chromosome
chromosome number 13
O chromosome number 18

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