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tiny-mole [99]
3 years ago
5

The button-like structure that holds homologous chromosomes together at their middles during cell division is called the

Biology
1 answer:
Volgvan3 years ago
7 0

Answer:

CENTROMERE

Explanation:

The CENTROMERE is the primary constriction region where the identical DNA molecules are most tightly bonded to each other during mitosis and meiosis.

The typical chromosome in metaphase is composed of two sister chromatids joined by the centromere.

Surrounding the centromere, we can find the kinetochores. These are laminar proteinic structures forming a plate where the spindle and kinetochore fibers will join during chromatids separation.

The position of the centromere defines the chromosomes as acrocentric, metacentric, or submetacentric.

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The _____ nervous system contain(s) the sensory and motor neurons connecting the CNS to the rest of the body.
devlian [24]

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Explanation:

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- motor neurons that runs the central nervous system to all parts of the body.

Thus, Peripheral nervous system is the answer

5 0
3 years ago
How many gene combinations are possible in gamete production for a dihybrid cross
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nexus9112 [7]
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KatRina [158]

Answer: B

Explanation:  Ultimately, one wishes to determine how genes—and the proteins they encode—function in the intact organism. Although it may sound counterintuitive, one of the most direct ways to find out what a gene does is to see what happens to the organism when that gene is missing. Studying mutant organisms that have acquired changes or deletions in their nucleotide sequences is a time-honored practice in biology. Because mutations can interrupt cellular processes, mutants often hold the key to understanding gene function. In the classical approach to the important field of genetics, one begins by isolating mutants that have an interesting or unusual appearance: fruit flies with white eyes or curly wings, for example. Working backward from the phenotype—the appearance or behavior of the individual—one then determines the organism's genotype, the form of the gene responsible for that characteristic. You can also go to https://www.ncbi.nlm.nih.gov/ and https://quizlet.com/ to find other answers.

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