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NeX [460]
3 years ago
10

Is this karyotype from a male or female? how do you know ? Also do they have down syndrome? How?

Biology
1 answer:
Arlecino [84]3 years ago
7 0

Answer:

Its a male, without down syndrome

Explanation:

The fact that it's a male is indicated from the presence of the Y chromosome. In order for this man to have down syndrome, he would have had 3 chromosomes at 21, which he doesnt, meaning he doesnt have down.

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If you are interested in the evolutionary relationship of animals that have four limbs, which of the following would be the outg
trapecia [35]

Answer:

  • First outgroup → Ray-Finned Fishes
  • Second outgroup → Sharks

Explanation:

The outgroup is the most distant taxonomic group that shares no traits or characters with the lineages of interest, which compose the ingroup. You can compare the outgroup with the ingroup to determine the evolutive relationship and which characters are primitive or derived.    

Even though the outgroup shares a common ancestor with the ingroup, this is placed far away in evolution, making the outgroup to be the taxonomic group less related to the other lineages. The lineages in the ingroup share another common ancestor that is more recent in history.

To select the outgroup, you need to focus on what you are interested in. There might be several outgroups, but you should choose the one that is more related or closer to the ingroups. This selection is important because you need to make comparisons to understand the evolution of specific traits.  

In the exposed example, we need to focus on animals that have four limbs. Then, we might assume that the ingroup is composed of Amphibians Crocodiles Dinosaurs. Sharks and Ray-Finned Fish do not have four limbs, so they might be considered outgroups.

From these two outgroups, sharks have a cartilaginous skeleton, while Ray-Finned Fishes have a bony skeleton. This fact makes ray-finned fishes more related to the ingroup than the sharks. So,

  • First outgroup → Ray-Finned Fishes
  • Second outgroup → Sharks

8 0
2 years ago
Which element would you expect to be more unstable/reactive, neon or calcium? why?
melamori03 [73]

Answer:

Calcium

Explanation:

Between Neon and Calcium, neon will be more stable compared to the calcium.

Neon belongs to the group of elements on the periodic table called the noble gases. These are the most stable elements and they do not react with other elements.

  • Calcium on the other hand is reactive
  • It requires a loss of two electrons to attain stability.
  • Therefore, it is a more reactive element.
5 0
3 years ago
True or false: All of the cells in the fetus's body have the same DNA
kondaur [170]

Answer:

Inside most every cell in your body, you have the same 46 chromosomes, carrying the same genes. But not all the cells in your body are the same. Nerve cells, blood cells, cells lining your intestine, they all look different and they do different jobs

Explanation:

7 0
2 years ago
Why was Wegener’s theory rejected?
Fynjy0 [20]

He could not explain why the continents were moving.

4 0
3 years ago
if you were in charge of an effort to help reduce eutrohication and the soread of dead zones in the gulf of Mexico, whichof the
Basile [38]

Hypoxic waters kill high levels of aquatic species, disrupting the food chain and habitat. In addition to wrecking ecological havoc, the dead zone can be a financial drain on coastal communities.

8 0
3 years ago
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