Q:

How many chromosomes do dogs have?

A:

Quick Answer

Dogs have 39 pairs of chromosomes, for a total of 78. This works out to 76 autosomes and two sex chromosomes. As with other mammals, the karyotype of male dogs is XY whereas females' karyotype is XX.

Continue Reading
How many chromosomes do dogs have?
Credit: Tom Childers CC-BY 2.0

Full Answer

Although dogs have 39 pairs of chromosomes (compared to 23 pairs for humans), dogs have fewer genes overall. Researchers sequencing the canine genome have identified around 19,000 dog genes compared to the 25,000 or more genes in the human genome. Despite having 6,000 fewer genes than humans, dogs exhibit a diverse range of phenotypes, from animals as large as a Great Dane or St. Bernard to toy dogs weighing no more than a few pounds. Geneticists think the canine genome may be especially prone to gene duplications and chromosomal rearrangements compared to the genomes of humans and other mammals.

Learn more about Dogs

Related Questions

  • Q:

    How many chromosomes does a cat have?

    A:

    Most cats, including domestic breeds, have 19 pairs of chromosomes for a total of 38. Some types of cat in South America, however, have only 36 chromosomes, including ocelots, kotkots and margays. Dogs have more than double the number of chromosomes with 39 pairs, while humans have 23 pairs.

    Full Answer >
    Filed Under:
  • Q:

    What is the difference between sister chromatids and homologous pairs?

    A:

    The difference between homologous pairs and sister chromatids is that homologous pairs are already in the cell to begin with, but sister chromatids are formed during the meiosis I stage The purpose of meiosis is to drop the number of chromosomes in a cell down to 23 so that when a sperm and egg combine, 46 chromosomes are present.

    Full Answer >
  • Q:

    How many chromosomes does a snake have?

    A:

    According to the Reptile Database, the majority of snakes have 36 pairs of chromosomes. Twenty of the chromosomes are considered microchromosomes, while the rest are called macrochromosomes. However, the term "snakes" refers to over 3,400 different species and many have not had their karyotype studied, so some variation may exist.

    Full Answer >
    Filed Under:
  • Q:

    How many chromosomes does a lion have?

    A:

    A lion has 38 chromosomes that are grouped into 19 pairs. Fifteen of these pairs are common in all cat species.

    Full Answer >
    Filed Under:

Explore