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natita [175]
3 years ago
5

What is the name of the chromosomal condition that is the result of an error in meiosis, causing a human to have three copies of

chromosome 21?
Biology
1 answer:
Olenka [21]3 years ago
6 0
The name is Down Syndrome.
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You study how blowflies aid in animal decomposition in forest ecosystems. when would be the best time for you to do your researc
Studentka2010 [4]

The answer is; in the summer

Insects such as blowflies increase their population in the summers when the temperatures are warm. One reason is that most insects are ectotherms hence their body temperatures are dependent on ambient environmental temperatures. In addition, the maggot stage of the blowfly pupates mostly in warm and dry conditions hence increasing winged flies populations in the summer.


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4 years ago
Dimples are dominant; no dimples are recessive. Mr. Dowling is heterozygous for dimples, and Mrs. Dowling is also heterozygous f
morpeh [17]

Answer:

There offspring will have dimples

Explanation:

If wrong I am sorry.

7 0
3 years ago
What is the difference between directional selection and disruptive selection
morpeh [17]
Directional selection is where one phenotype is favored, so an example would be "a population of madagascar hissing cockroaches suffers heavy predation from lizards. Because their heads are small, the lizards are unable to eat the very largest adult cockroaches, and instead prey upon small and medium sized adults, so as a result the large cockroaches are favored and live". 
Meanwhile, disruptive selection is where both extreme phenotypes are favored, an example would be "a population of rabbits can have black fur, white fur or grey fur. This population of rabbits lives in an area of white rocks. When a local volcano erupts, black volcanic rock now dots the landscape amongst the white rocks. Now the black and white rabbits live longer because the black and white spots on the landscape camoflauge them. The two extreme phenotypes are being favored."
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How do scientists calculate population density ?
Viefleur [7K]
They use a formula and that formula is 
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Which is it? <br><br>a , b, c, or d?
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