A mating between a male donkey (2n = 62) and a female horse (2n = 64) produces sterile mules. why are mules sterile?

1 answer:

6 0

The horse and donkey, though closely related by sharing a common ancestor, are different species. They have different number of chromosomes hence pairing of homologous chromosomes during fusion of gametes becomes complicated. The mule will have an extra chromosome from the horse hence will have abnormalities such as sterility. A Mule is unable to reproduce due to this same phenomenon. Homologous chromosomes are not well paired for meiosis I.

You might be interested in

Which taxonomic group is a group of similar families?

adell [148]

Answer:

From smallest to largest, the levels are species, genus, family, order, class, phylum, and kingdom. Each of the ranking levels is called a taxon. Just as a genus is a group of similar species, a family is a group of similar genera. An order is a group of similar families.

4 0

3 years ago

What do some ppl call space? high energy/ final frontier/ open sky/ vast universe

mihalych1998 [28]

Answer:

Final Frontier

Explanation:

Space is the "Final Frontier"

3 0

2 years ago

From 2010 to 2011 the percentage of electricity generated from burning coal fell, while the percentage of renewable energy sourc

Natali [406]

<span>C) Less carbon dioxide would be released into the atmosphere.

</span>

6 0

3 years ago

Tortoises found on the Galapagos Islands can have varied phenotypes. One of the variations in the phenotypes is with regard to

qwelly [4]

Answer: B:The drought decreased the grass and vegetation on the ground, leaving only vegetation on shrubs and trees above the ground. Natural selection selected for the tortoises with the domed shells and hoods.

Explanation:

8 0

3 years ago

What organelle is this?

sweet [91]

Answer:

I'm a little on the fence, but I believe that organelle is either a paramecium or a euglena!

Explanation:

helpful little image link for comparison!

[ source for organelle image comparison]

https://media.istockphoto.com/vectors/vector-illustrationof-unicellular-organisms-amoeba-proteus-paramecium-vector-id1225645059?k=20&m=1225645059&s=612x612&w=0&h=SzUbQXS7I0hh2NBcl5xsEKhPj21ebx6uRZHda7k0-hU=

4 0

3 years ago