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FinnZ [79.3K]
2 years ago
9

At what point during meiosis do homologous chromosomes pair up?

Biology
2 answers:
Readme [11.4K]2 years ago
8 0

Answer:

Prophase 1

Explanation:

In prophase 1, homologous chromosomes pair up and exchange sections of DNA in a process called crossing over.

pashok25 [27]2 years ago
6 0
Explanation: Pairing of homologous chromosomes occur during prophase 1. This is also known as synapsis. During synapsis there is crossing over too.
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Macronutrients are nutrients that contain inorganic components. <br> a. True <br> b. False
emmasim [6.3K]
This is false, as macronutrients are all made of organic components. Macronutrients are carbohydrates, fats, and proteins. The most basic unit for carbohydrates is glucose. Glucose is an organic molecule with a chemical formula of C6H12O6 which then is broken down by the body to convert it to energy (in the form of ATP). Fats or triglycerides are comprised of fatty acids and a glycerol backbone which can also be used by the body for energy or can be stored for later use. Proteins on the other hand are functional molecules wherein the basic unit for proteins is the amino acid. Proteins are exemplified because they contain nitrogen (CHON). All of which can be used as energy and has specific caloric value per gram (4 kcal for every gram of protein and carbohydrates and 9 kcal for every gram of fat).

Micronutrients are usually inorganic compounds with no caloric value. Usually these micronutrients are essential for maintaining biochemical pathways in the body. For instance, niacin and riboflavin are vitamins that are needed in the production of NAD and FAD which are important for reduction-oxidation reactions in the body (i.e. tricarboxylic acid cycle and electron transport chain).
6 0
3 years ago
A subset of a population of birds leaves its habitat on the mainland and colonizes a nearby island. The birds, after a period of
Kazeer [188]

Answer:

The answer is A - The populations will not be able to interbreed because they are different species and different species cannot interbreed

Explanation:

The population of birds become reproductively isolated because they are different species and different species are unable to interbreed. This is as a result of barriers which are called mechanisms of reproductive isolation which involves mechanisms, behaviors and processes that are critical for speciation. In reproductive isolation the different species are able to live in the same are but their properties and characteristics do not allow them interbreed to produce healthy and sterile offspring.

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3 years ago
The inherited genes in these chromosomes contain DNA sequences that are related to particular what?
kicyunya [14]
Scientists first discovered chromosomes in the nineteenth century, when they were gazing at cells through light microscopes. But how did they figure out what chromosomes do? And how did they link chromosomes — and the specific genes within them — to the concept of inheritance? After a long period of observational studies through microscopes, several experiments with fruit flies provided the first evidence.
What is a gene?

Physically, a gene is a segment (or segments) of a chromosome. Functionally, a gene can play many different roles within a cell. Today, most scientists agree that genes correspond to one or more DNA sequences that carry the coding information required to produce a specific protein, and that protein in turn carries out a particular function within the cell. Scientists also know that the DNA that makes up genes is packed into structures called chromosomes, and that somatic cells contain twice as many chromosomes as gametes (i.e., sperm and egg cells).

But what were the key scientific discoveries that helped establish these principles? As it turns out, the connections between genes, chromosomes, DNA, and heredity were not recognized until long after researchers caught their initial glimpse of chromosomes. The following sections present an abbreviated summary of the major discoveries that revealed these connections.



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4 0
3 years ago
In the Hardy-Weinberg principle, the actual number values of p and q will not change if five specific conditions are being met.
JulsSmile [24]

In the Hardy-Weinberg principle, the values of p and q will not change if evolution is not occurring.

<h3>What is the Hardy-Weinberg principle?</h3>

The Hardy-Weinberg principle is a model used in population genetics to estimate genotypic and allele frequencies in a population.

The Hardy-Weinberg principle states that allele and genotypic frequencies remain constant in absence of evolutionary forces.

These evolutionary forces include nonrandom mating, gene drift, gene flow, mutation and natural selection.

Learn more about the Hardy-Weinberg principle here:

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What happens to glucose during cellular respiration
nekit [7.7K]

Explanation:

During cellular respiration, glucose is broken down and energy is released in the process.

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  • In cellular respiration, glucose combines with oxygen.
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  • To be released, one Phosphate is detached to produce ADP.

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