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kolezko [41]
3 years ago
12

What is nondisjunction

Biology
2 answers:
Marina CMI [18]3 years ago
6 0
The failure of one or more pairs of the homologous chromosomes or sister chromatids to separate normally during nuclear division
Harlamova29_29 [7]3 years ago
3 0

Answer:

the failure of one or more pairs of homologous chromosomes or sister chromatids to separate normally during nuclear division, usually resulting in an abnormal distribution of chromosomes in the daughter nuclei.

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The skin pigment melanin is expressed differently according to exposure to sunlight, with a greater production of the molecule w
soldier1979 [14.2K]

answer:

by having a high genetic level of melanin in your skin, you're skin is more protected from the ultra violet sun rays. Darker skinned races have more melanin present, these races originate from hot countries where sunlight is often present; the production of melanin in their skin allows them to reflect and inhibits they're skin from becoming extremely damaged. Light skinned races don't have a large amount of melanin due to they're native countries lacking sunlight. This is an evolutionary adaptation of the human race.

5 0
3 years ago
Read 2 more answers
The water level at the beach changes during the day. What causes the different water levels?
dexar [7]

Answer:

C. The moon's gravitational pull and Earth's rotation

Explanation:

The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.

Hope this helped

:)

3 0
3 years ago
Que tipos de ARN hay en nuestras células
Ymorist [56]

Answer:

ARN mensajero (ARNm), ARN ribosómico (ARNr) y ARN de transferencia (ARNt)

3 0
3 years ago
huntington disease is a dominant disease caused by expansion of the trinucleotide repeat region of the htt gene that results in
Travka [436]

By haphazardly introducing a transgene harboring a disease-causing mutant variant of the HTT gene into the genome of a mouse or primate, it is possible to produce an animal model with the majority of the symptoms of this condition. Here option B is the correct answer.

Huntington's disease is an uncommon, genetic condition that results in the gradual degeneration of brain nerve cells. Huntington's illness, which frequently results in mobility, cognitive, and psychological problems, has a substantial impact on a person's functional capacities.

A DNA region known as a CAG trinucleotide repeat is involved in the HTT mutation that causes Huntington's disease. Three DNA-building building pieces that are repeated several times in a row make up this region.

Complete question:

Huntington's disease is a dominant disease caused by the expansion of the trinucleotide repeat region of the Htt gene that results in the production of a Huntingtin protein with an expanded number of glutamines. An animal model with most features of this syndrome could be created by

A - knocking in a wild-type copy of the Htt gene to a mouse or primate genome.

B - randomly inserting a transgene containing a wild-type allele of the Htt gene to a mouse or primate genome.

C - randomly inserting a transgene containing a disease-causing mutant allele of the Htt gene into a mouse or primate genome

D - knocking out one copy of the wild-type Htt gene from a mouse or primate genome.

E - knocking out both copies of the wild-type Htt gene from a mouse or primate genome.

To learn more about Huntington's disease

brainly.com/question/12572808

#SPJ4

3 0
1 year ago
NEED HELP ASAPPPP!!! PLEASEE
pentagon [3]

stop spamming please u will get help be relaxed and wait

3 0
3 years ago
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