Final answer:
The term 'Heterogamety' describes the presence of dissimilar chromosomes in males and females of the same species. In mammals, XX denotes females and XY denotes males, whereas in birds, ZZ denotes males and ZW denotes females. This phenomenon of sexual chromosomal differences leads to varying sex determination systems in different species.
Step-by-step explanation:
The word which aptly describes the presence of dissimilar chromosomes in males and females of the same species is c) Heterogamety.
This term is used in the field of genetics and it refers to the phenomenon wherein the sex chromosomes of males and females have different forms. For instance, in mammals the presence of XX denotes females (homozygous) and XY denotes males (heterozygous), while in birds, the sex is determined by the presence of ZZ in males (homozygous) and ZW in females (heterozygous). This phenomenon contributes to the diversity of genetics and gives rise to different sex determination systems in various species. Therefore, 'Heterogamety' is the correct term that describes this form of genetic constitution in different sexes of the same species.
Heterogamety refers to the situation where different sex chromosomes determine the gender of males and females in a species. Examples of heterogamety include the XX (homozygous) in females and XY (heterozygous) in males in mammals, and the ZW (heterozygous) in females and ZZ (homozygous) in males in birds.
Learn more about Heterogamety