How many chromosomes are responsible for sex determination in dogs if the diploid set of chromosomes is 78? - briefly
In dogs, the number of chromosomes responsible for sex determination is 39 out of the total diploid set of 78 chromosomes. This includes one X chromosome in male dogs and two X chromosomes in female dogs.
How many chromosomes are responsible for sex determination in dogs if the diploid set of chromosomes is 78? - in detail
In mammals, including dogs, sex determination is governed by a pair of sex chromosomes that differ between males and females. The diploid set of chromosomes in dogs consists of 78 chromosomes, which are arranged in pairs (39 pairs). Of these, one pair determines the sex of the dog.
In female dogs, both sex chromosomes are typically large and similar in size, known as X chromosomes. Therefore, a female dog has two X chromosomes in her diploid set, making up part of the 39 pairs. In male dogs, one of the sex chromosomes is smaller and distinctly different from the X chromosome, known as the Y chromosome. Thus, a male dog possesses one X chromosome and one Y chromosome, comprising the sex chromosome pair in his diploid set.
To summarize, out of the 78 chromosomes that make up the diploid set in dogs, two specific chromosomes are responsible for sex determination: the X and Y chromosomes.