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Elina [12.6K]
3 years ago
13

Fragile X syndrome - disorder in humans caused by the inheritance of genes that have undergone insertions of a string of 3 or 4

nucleotides, repeated over and over.
TRUE
FALSE
Biology
1 answer:
trapecia [35]3 years ago
3 0

Answer:

TRUE

Explanation:

Fragile X syndrome  is a disorder in which nucleotide repeats will result in increase in copy number which will make the threshold unstable < it is basically a trinucleotide repeat disorder

You might be interested in
This bonds to cytosine (C) in DNA.
shtirl [24]

Answer: <u>Guanine </u>

According to Chargaff's rule, the base pairing in the DNA and RNA is fixed. Adenine always pairs with Thymine in DNA and Uracil in RNA. Guanine pairs up with cytosine. This complementary base pairing is universal and constant. That's why amounts are also equal. It means if cytosine is 20% in any DNA sample, then amount of guanine would be 20% as well.

4 0
3 years ago
Which list represents the proposed sequence in plant evolution?​
Phoenix [80]

Answer:

1. Bryofita

2. vascular plants

3. Seed vascular plants (gymnosperms)

4. Angiosperms

Explanation:

1. Bryofita

Around 475 million years ago, the origin of plants was thought to originate from aquatic ancestors (green algae). Adaptation to terrestrial life is proven by the presence of sporopolenin and layered gametangia that protect gametes and embryos. This adaptation occurs in bryophytes which are the first terrestrial plants. Bryofita or mosses develop into various vanations in their group. Most briolites do not have vascular tissue (water from the environment is diluted and absorbed by the SD, but some briophytes have water-carrying vessels.

2. Vascular plants

Around 400 million years ago, the evolution of plants was marked by the diversification of vascular plants (vascular plants). These early vascular plants are seedless plants, for example in the types of ferns seria into other groups of seedless plants.

3. Seed vascular plants (gymnosperms)

Plant evolution begins with the appearance of seeds, which are structures that protect the embryo from drought and the threat of environmental change. The emergence of these seed plants accelerated the expansion of plant colonization on land. Plant seeds consist of embryos and food reserves that are protected by a cover. Seed vascular plants appeared about 360 million years ago with the appearance of Gymnosperms. Gymnosperms consist of conifers with a variety of types. Conifers and ferns dominate life in the months between more than 200 million years.

4. Angiosperms

About 130 million years ago marked the emergence of flowering plants that have a somewhat reproductive structure

complicated where the seeds are protected by a room called the ovary.Because the seeds are protected in such a way that this group discusses closed seed plants or Angiosperms

Learn More

About African elephant species and their relationship to the environment brainly.com/question/12630439#

Details

Class : Junior High

Subject : Biology

 

Keywords

- Plant

- Plant Evolution

3 0
3 years ago
Worldwide, how many children die each year from diseases for which vaccinations are available?
Papessa [141]
In this scenario,I guess the answer is roughly around 300 children die every year from the diseases in which the vaccinations are available. Hope this is the correct answer then and would surely be of big help to you then.
7 0
3 years ago
Why would losing just a few dozen aquatic species lead to the end of life in the ocean as we know it?
Ilia_Sergeevich [38]

Answer: It would unbalance the ecosystem.

Due to the fact that if some species die off, the other species that rely on those species for food or protection would loose that food/ protection which may lead to their extinction and their extinction would lead to another extinction and so on.

8 0
3 years ago
"Synthesis of one protein cannot take place without the presence of another protein." Is this statement true or false and why? T
lbvjy [14]
<span>The third option:</span><span>This statement is true because every step in protein synthesis requires enzymes, which are nothing but proteins.</span><span>
</span>I mean if you look at rRNA which is needed to make polypeptide chains, it is 2/3 protein, and then the helices, ss binding proteins, DNA polymerase and everything in transcription is protein.
So that last option/ third option is the best
8 0
3 years ago
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