Biology Exam 3

Scotty Watson
Flashcards by Scotty Watson, updated more than 1 year ago
Scotty Watson
Created by Scotty Watson over 5 years ago
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review for 3rd test.

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Question Answer
In humans, a typical body cell is called a(n) __________. somatic cell
In humans, a typical body cell, called a somatic cell, has _____ chromosomes. 46
If we use a microscope to examine human chromosomes in metaphase of mitosis, we see that each of the chromosomes consists of __________. 2 sister chromatids
How many duplicated chromosomes does a human cell contain at metaphase? 23
Almost every chromosome has a twin that resembles it in ______. length centromere position staining pattern
Two matching pairs of chromosomes are called __________. homologous chromosomes
Two chromosomes of such a matching pair are said to be homologous chromosomes. Why? because each chromosome carries genes controlling the same inherited characteristics
What is the location of a particular gene within a chromosome known as? locus
X and Y chromosomes are also known as sex chromosomes
Define autosomes ? the name given to all the chromosomes except to the sex chromosomes (X and Y)
Are all of your chromosomes fully homologous ? females - yes males - no
What is a key factor in the life cycle of all species that reproduce sexually ? having two sets of chromosomes, one inherited from each parent
Why are most animals and plants said to be diploid ? because all their somatic cells contain pairs of homologous chromosomes
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