Yoruba peoples are most closely related to which other population from the phylogenetic tree?

1 answer:

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Yoruba people are directly related to africans, they are mostly concentrated in Nigeria, Republic of Benin and Togo, africans countries. They are a very large population, reaching 40 million citizens, more than several countries in south america and europe, Yoruba people have existed since before IV century b.c, they even ha a powerful city named lle ife, cultural center of the population. After years, many Yoruba colonies were aslaved and taken to North, and south America, influencing their religions and music style, countries like Venezuela, Cuba, Dominican Republic, Brazil, and Panama even created religions that use Yoruba words, such as ifa (destiny), ochosi (health), olofin (jesuschrist) and others.

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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).

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3 years ago

The four types of nitrogen bases of DNA nucleotides are 1________,2______, guanine, and cytosine.

Sonja [21]

Answer:

1. Adenine

2. Thymine

Explanation:

These are the four nitrogen bases of DNA nucleotides. It's just something that you have to memorize in order to be able to successfully study DNA. In case you are asked which base pairs with which, always remember this saying about base pairs: A and T, and, G and C.

Have a nice day and please don't forget to give me Brainliest!

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3 years ago

Read 2 more answers

In ________ conditioning, an established conditioned stimulus is paired with a new neutral stimulus.

irina [24]

An established conditioned stimulus is paired with a new neutral stimulus in: higher-order conditioning.

Classical conditioning refer to a learning process that involves the repeated pairing of two (2) stimuli:

Conditioned stimulus.

Unconditioned stimulus.

Basically, classical conditioning is a learning procedure which helps psychologists in understanding when a neutral stimulus is paired with a conditioned response or a neutral stimulus and an unconditional stimulus.

Similarly, a higher-order conditioning involves pairing an established conditioned stimulus with a new neutral (the second-order) stimulus, in order to make the new stimulus elicit (bring forth) the conditioned response, without presenting the initial conditioned stimulus.

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3 years ago

Phase of photosynthesis where light energy is converted to atp

sasho [114]

The answer is light reactions

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3 years ago

Examine the following genetic sequences and determine which pair are the most similar based on their ED (evolutionary distances)

kakasveta [241]

Answer:

Species 1 = ATTGGCCATT and Species 3 = TTTGGCCATT are the most similar.

Explanation:

Evolutionary distance (ED) is defined as the total number of substitutions of nucleotide in one site between two DNA sequences that are homologous. It is also referred to as the number of substitutions of amino acid in one site between two protein sequences that are homologous. Based on the definition of ED, the two most similar species are species 1 and 3.

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3 years ago