A condensed, female X chromosome is called a
a. Barr body.
b. Morgan sphere.
c. SRY gene.
d. karyotype.
e. linkage map.
A
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Axillary buds _____
A) are produced by the cork cambium B) have dormant meristematic cells C) are composed of a series of internodes lacking nodes D) give rise to secondary xylem E) do not form a vascular connection with the primary shoot
Which sequence most accurately describes the
complete path of blood through the circulatory system of a fish? a. atrium >>> ventricle >>> gill capillaries >>> atrium >>> ventricle >>> all other capillaries b. atrium >>> ventricle >>> gill capillaries c. gill capillaries >>> atrium >>> ventricle >>> all other capillaries d. gill capillaries >>> all other capillaries >>> atrium >>> ventricle e. none of these
DNA is present in all of the following human cell types except ________
A) skin cells B) erythrocytes (mature red blood cells) C) leukocytes (white blood cells) D) hair E) buccal (cheek) cells
Which of the following was not one of Mendel's main inferences from his research?
A) The genetic material elements come in pairs. B) Genes are lengths of DNA. C) The basic units of genetics are material elements. D) The genetic material elements separate during the formation of gametes. E) The genetic material elements can retain their character through many generations.