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3 years ago

Identical copies of chromatin held together by cohesin at the centromere are called _____.

Biology

1 answer:

Amanda [17]3 years ago

7 0

Answer:

Sister chromatids.

Explanation:

Sister chromatids are the two identical halves of a chromosome that are held together at centromere with help of cohesin. DNA replication in the S phase of the cell cycle doubles the amount of DNA. The copies of the DNA formed during DNA replication are accommodated in sister chromatids. Hence, two sister chromatids of a chromosome carry the identical DNA helices and associated proteins.

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What is the difference between a GMO and cloning

viktelen [127]

Answer:

A GMO Genetically Modified Product though similar to cloning is quite different. Cloning is the process of using egg cells from an individual to produce a new organism. When the baby is born, it is genetically identical to the parent, an exact copy. This process occurs in a lab. Genetic Engineering, which is used to make GMOs, uses technology to alter or change an organism's genes. New genetic information can be added to or removed from an existing set of DNA.

<em>So I would say that some of the differences between GMOs and cloning include that:</em>

Cloning strives to create exact copies of an organism's parent while GMOs remove and add different genes to form desired offsprings like making a product last longer or making the product grow larger faster.

Hopefully, this helped you! Have a nice day :)

4 0

3 years ago

As the course of evolution has proceedin plants, what is the overall trend in the relationship of the diploid stage and the hapl

Lostsunrise [7]

<span>Meiosis in simple terms is the process by which gametes (sperm and egg) fuse together to produce a fertilised egg. Haploid is a word that refers to how many chromosomes a certain cell has. In this case the gametes have a haploid number of chromosomes, which is half the number a normal cell has. A normal cell has a diploid number of chromosomes. So in meiosis the two gametes come together with their hapoid number of chromosomes each to create an egg that has a diploid (standard) number of chromosomes.</span>

3 0

4 years ago

(WILL GIVE BRAINLIST) Rabbits are very popular domesticated animals, so popular that there are over 300 breeds of domesticated r

dem82 [27]

1) Breed A average weight = 9 pounds. Breed B average weight = 12.125 pounds. 2) Parentals' genotype, female size, number of deliveries, food, competition. 3) Genetic and non-genetic factors.

<h3>What is an average?</h3>

The average is the arithmetic media.

It can be calculated by adding the values of all the provided numbers, and then dividing the result by the total amount of numbers.

1) Average weights

Breed A: 10, 8, 7, 10, 9, 9, 10, 9

Average: (10 + 8 + 7 + 10 + 9 + 9 + 10 + 9) / 8 = 72 / 8 = 9 pounds.

Breed B: 10, 12, 14, 13, 10, 15, 11, 12

Average: (10 + 12 + 14 + 13 + 10 + 15 + 11 + 12) / 8 = 97 / 8 = 12.125 pounds.

2) Influencing factors:

Genetics: Individuals' size and weight can be inherited from their parents.

Female size: If the female is small, there are more probabilities of having small progeny than big ones, especially if the litter is numerous. This factor is known as uterine capacity.

The Number of deliveries: It is also significant the female's number of deliveries. Very young inexperienced mothers produce smaller litters and small-sized progeny than expert mothers.

Food: Individuals that are fed with a compete high-quality food will be bigger and will weigh more than those that are fed with poor-quality food.

Competition: If litters are numerous or there are many individuals, competition for resources might increase, leading the individuals to express lower weight.

<h3>How to track the growth rate?</h3>

To track the growth rate, we could consider genetic factors and non-genetic factors.

Genetic factors are related to the parentals' genotypes. The progeny inherit the alleles from their parents, and allele combinations determine the size and weight of individuals.

Non-genetic factors refer to the parental conditions before mating, and to external environmental factors.

To track the growth rate of the two rabbit breeds we could

Analyze the phenotypes and genotypes of the parents.

Evaluate the state of each parent before mating. At this point, we could consider age, size, sèxual maturity, experience, number of deliveries, receptiveness, if females are still breastfeeding or if they have recently wean, among other factors to analyze.

We could also consider the birth weight and the weaning weight, which are highly correlated, and give information about nourishing during gestation and lactation.

External factors such as food quality and quantity, stressful factors, diseases, seasons, temperature, and others are also important to consider.

You can learn more about factors affecting weight at:

brainly.com/question/1105798

brainly.com/question/2973463

4 0

2 years ago

How does biodiversity depend on a species' ability to reproduce?

Y_Kistochka [10]

Without reproducing biodiversity will decline dramatically because all species' would go extinct.

6 0

4 years ago

grass is useful. describe the ecological services that grass performs in a hay field, on a golf course, or along the shoulder of

trapecia [35]

Adding grass to places such as hay fields, golf courses and highway shoulders serves many purposes. First, the grass adds to the aesthetic appeal of the area, making it more pleasant to look at. The grass also helps prevent soil erosion by keeping the soil in place. In golf courses, the grass is important in making the golf ball roll properly for optimal playing experience. Another important role of the grass, regardless of location, is the addition of water to the atmosphere through transpiration. This yields to more rains and a better climate of the region.

5 0

3 years ago