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Viefleur [7K]
3 years ago
13

In later chapters, you will learn more about the regulation of gene expression. One way to regulate gene expression is to make c

hanges to the histone proteins to alter how tightly the DNA is coiled and wrapped. The more tightly coiled and wrapped a particular region of DNA is, the less likely it is that the genes in that region will be expressed. Bearing this in mind, how tightly do you think regions of heterochromatin are compacted?
Biology
1 answer:
babymother [125]3 years ago
8 0

Answer:

Highly condensed.

Explanation:

The different region of the eukaryotic chromosome are euchromatin region and heterochromatin region. The heterochromatin region is genetically inactive whereas euchromatin region is highly active.

The heterochromatin region is generally present at the periphery of the nucleus. This region is transcriptionally inactive. This is because of the compactness of DNA. DNA is packed very tightly or present in highly condensed form with the histones.

Thus, the answer is highly condensed.  

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How are the algae cells different from the other cells?
MrRissso [65]

Answer:

Although both algae and plants are photosynthetic in nature and are classified as eukaryotes (have highly differentiated cells that contain specialized structures like the nucleus), the two still differ in the following aspects:  Algae can either be unicellular and multi- cellular while plants are multi-cellular

8 0
3 years ago
Interpret the Punnett square. A Punnett square with four rows and four columns. The first row is labeled big-A, big-B. The secon
Naddika [18.5K]

Answer:

The genotypes shown represent gametes. False

One of the possible offspring genotypes is AABB. True

The parent genotypes are ABAbaBab×ABAbaBab. True

The parent genotypes are ABAbaBab×ABAbaBab. True

This cross shows two alleles for two traits. True

The gametes are diploid and the offspring are diploid. False

The genotypes shown are correct for a dihybrid cross. True

Explanation:

║ AB ║ Ab ║ aB ║ ab

AB║ABAB ║ ABAb║ABaB║ABab

Ab║ AbAB║ AbAb ║AbaB║Abab

aB║aBAB ║ aBAb ║aBaB║aBab

ab║abAB ║ abAb ║abaB ║abab

Drawing the Punnett square we can deduce that the genotypes shown do not represent gametes because there are more than 2 pairs of chromosomes.

As shown in the second column second row of the Punnett square one of the possible genotypes is AABB, it is distributed different (ABAB) but it is the same possible genotype.

The parents' genotypes are the ones that are written in the first columns and first row, they coincide with the ones in the statement.

A dihybrid cross shows the cross between two genes that have different traits.

The gametes are always haploid and the offspring are diploid because the two gametes come together.

7 0
3 years ago
The excessive concentrations of circulating parathyroid hormone appeared to be caused by a tumor of the parathyroid gland or ___
Reika [66]

Answer:

parathyroidoma

Explanation:

The condition where the parathyroid hormone is produces excessively is termed as Hyperparathyroidism. This condition arises when the balance between the calcium and phosphorus gets disturbed. The calcium and phosphorus balance is affected in following two cases –  

a) When the parathyroid gland is not working properly due to its own problem usually termed as hyperparathyroidism or more specifically primary hyperparathyroidism

b) When the parathyroid gland is not working properly due to any other disease in the body affecting the functioning of parathyroid. It is termed as secondary hyperparathyroidism  

4 0
3 years ago
At the end of meiosis, the number of chromosomes in each daughter cell is halved because meiosis has 2 points A. two cell divisi
klio [65]
I believe it would be B not 100% sure tho
8 0
3 years ago
What are the levels of ecology, from the smallest level to largest level?
Vadim26 [7]

Answer:

The levels, from smallest to largest, are: molecule, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere.

Explanation:

8 0
3 years ago
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