How many chromosome pairs are responsible for sex determination in dogs if their number is 78? - briefly
Dogs have 39 pairs of chromosomes, making a total of 78. Among these, the sex-determining pair consists of two X chromosomes in females and one X and one Y chromosome in males.
How many chromosome pairs are responsible for sex determination in dogs if their number is 78? - in detail
Dogs, like humans, have a specific set of chromosomes that determine their sex. In dogs, as with most mammals, sex is determined by the X and Y chromosomes. Female dogs typically have two X chromosomes (XX), while male dogs have one X and one Y chromosome (XY). This system, known as the XY sex-determination system, is prevalent in many species of mammals.
When considering the total number of chromosomes in a dog's cell, it is important to note that dogs have 78 chromosomes in total, arranged in 39 pairs. Of these 39 pairs, one pair is responsible for sex determination—the X and Y chromosomes. Therefore, out of the 78 chromosomes, 2 are dedicated to determining the sex of the dog.
To summarize, in dogs with a total of 78 chromosomes, one pair (XX or XY) is responsible for sex determination. This means that out of the 39 pairs of chromosomes, the specific pair that dictates whether a dog will be male or female consists of either two X chromosomes (resulting in a female dog) or one X and one Y chromosome (resulting in a male dog).