Some species have same number of chromosomes but they are different. suggest an explanation
some species have same number of charosomes but they are different because Fusion is a common way for animal species to end up with a different number of chromosomes from their ancestors.
Differences in chromosome size and organization can reflect variations in genetic complexity and evolutionary history among different species. For example, species with larger genomes may have more chromosomes or larger chromosomes. The organization of chromosomes, such as the presence of specific genes or repetitive sequences, can also vary between species, influencing traits and adaptations.
Each chromosome contains a section of your DNA. a human has 23 pairs of chromosomes, and each part contains instructions for different things. The 23rd chromosome is where the sex is decided in humans, as the pair is either XY for a male or XX for a female. Different animals have different chromosome numbers, which is why they cannot breed with different species.
A Z chromosome is a sex chromosome in a species in which the female is heterogametic (i.e. has different sex chromosomes). The counterpart is the W chromosome. In an XY system (e.g. humans), the male is heterogametic, XY, and the female is homogametic, XX. In a ZW system, the male is homogametic, ZZ, and the female is heterogametic, ZW. Examples of species with ZW systems include all birds, many reptiles, fishes and some insects.
Physiological similarities suggest the species evolved from the same ancestor.
Polyploid speciation occurs through the duplication of an organism's entire set of chromosomes, leading to the formation of a new species with a different chromosomal count. This can happen through either autopolyploidy (involving duplication within the same species) or allopolyploidy (involving hybridization between different species followed by chromosome duplication).
The number of genes varies from chromosome to chromosome and the number of chromosomes varies from species to species (from as few as 1 single chromosome per cell to as many 30,000 chromosome pairs per cell). Human cells have 23 chromosome pairs per cell.
Chromosome number is used in species identification because it is a stable and unique characteristic of a species. Variations in chromosome number can indicate genetic relationships between species, and can help distinguish between closely related species. Additionally, chromosome number is often conserved within a species, making it a useful tool for taxonomic classification.
Biographical observations suggest that a modification process caused new species to arise in the way that new species are showing up without explanation and with new adaptations to their environment. One example that is widely used is the appearance of opposable thumbs in humans and monkeys.
Chromosomes are the same no matter what gender you are, or what species, all cells have them. It is the information contained within those chromosomes that is different between cells.
It is different for different species but in Humans, each sperm (male gamete) has 23 chromosomes out of which 22 are autosomes and 1 is a sex chromosome.
50