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gulaghasi [49]
3 years ago
5

I need help with these questions!! (Biology) 28 Points!!

Biology
1 answer:
MrRa [10]3 years ago
6 0
1. A disease cause by a very small genetic change. Most cases result from the deleting of three bases in a gene for a protein called cystic fibrosis transmembrane changes which in a gene's DNA sequence can change proteins by altering their amino acid sequences which may affect one's phenotype.

2. It causes a mutation in the number of chromosomes, either extra chromosomes or missing chromosomes. Nondisjunction during meiosis can cause chromosomal disorders , such as a trisomy 21 (down syndrome) , Tuners syndrome , and Klinefelter's syndrome. It is a monosomy of the X sex chromosome.
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What is the primary difference between osmosis and diffusion
ANEK [815]

Answer:

Hey mate....

Explanation:

This is ur answer.....

<em>In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.</em>

Hope it helps!

Brainliest pls!

Follow me! ♧

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2 years ago
Describe three ways to slow population growth
Advocard [28]

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https://www.positive.news/society/5-possible-solutions-overpopulation/

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3 years ago
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Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must
scoundrel [369]

Answer:

1. They must be removed before sister chromatids or homologous chromosomes can separate

Explanation:

During the S-phase of the cell cycle, not only does DNA have to be replicated, but also newly synthesized DNA molecules have to be connected with each other. This replicated DNA (sister chromatids) remain physically connected with each other from S phase until metaphase. This physical connection is called Sister chromatids cohesion.

Sister chromatid cohesion depends on COHESIN, a tripartite protein complex that forms a ring structure to hold sister chromatids together during mitosis and meiosis. Cohesin regulates the separation of sister chromatids during cell division, either mitosis or meiosis. This sister chromatid cohesion is essential for the biorientation of chromosomes on the mitotic or meiotic metaphase spindle, and is thus an essential prerequisite for chromosome segregation. Without the cohesion, sister chromatids would not be segregated symmetrically between the forming daughter cells, resulting in aneuploidy.

Cohesion is established during S-phase of DNA replication, and the cohesins hold the sister chromatid together after DNA replication until anaphase when the removal of cohesin leads to separation of sister chromatids (meiosis II and mitosis) and homologous chromosomes (meiosis I).

8 0
3 years ago
Why are nutrient molecules important?
Zepler [3.9K]
B as the broken down molecules can be made into useful substances for the body
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Environmental science is the study of the interaction of humans with the environment. Which of these would NOT be included as pa
Katena32 [7]

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Ecology is the study of the interactions between organisms and their environment.

Explanation:

please make as brainiest.

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