The number and appearance of chromosomes in a cell is called a karyotype. A karyotype can only be seen and studied with a microscope. ... Karyotype analysis can reveal abnormalities, such as missing chromosomes, extra chromosomes, deletions, duplications, and translocations.
Link:https://study.com/academy/lesson/karyotype-definition-disorders-analysis.html
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Answer:
Explanation:
It's a normal part of nature, and one of many ecological factors that help keep the hundreds of thousands of living plants. It also keeps animals in balance with one another. 
 
        
             
        
        
        
The extermination of the dinosaurs, the start of a rise to dominance of mammals and a meteorite effect in mexico marks the boundary among the mesozoic and the cenozoic or as named as the k-p boundary. In addition, the cretaceous paleogene (K–Pg) boundary which is previously recognized as the cretaceous tertiary (K–T) boundary is a geological signature typically a thin band of rock.
        
             
        
        
        
 <span>The element Carbon is the </span>building block for all<span> known living things. That is why, in some science-fiction movies you hear the term, Carbon-based units.</span>
        
             
        
        
        
Answer:
Meiosis
Explanation:
Meiosis is one of the two types of divisions that cells usually undergo. However, meiosis is unique to sexually-reproducing organisms. Meiosis is the cell division which results in daughter cells with a reduced number of chromosomes (by half). Meiosis is used to produce gametes in sexually reproducing organisms. 
According to the question, Labrador retriever contains 78 chromosomes in each of its muscle cells, which is a somatic cell. Since Labrador retrievers are sexually reproducing organisms, a male one will produce gametes (sperm cells) via the process of meiosis. At the end of the meiotic process, sperm cells with 39 chromosomes each will be produced.