Biology, 06.04.2020 15:51 quantaviousw49

A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb bud instead of farther back helped make possible the evolution of the tetrapod limb. This type of change is illustrative of:.a. the influence of environment on development. b. heterochrony. c. a change in a developmental gene or its regulation that altered the spatial organization of body parts. d. gene duplication.

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Answer from: annie2u559

Explanation:

The given type of change is illustrative of a change in a developmental gene or its regulation that altered the spatial organization of body parts

Hox genes encode conserved homeodomain transcription factors that possess significant developmental power in shaping animal morphologyHox genes are also expressed in the nervous system of Drosophila and have a wide array of functions in the development of the peripheral and central nervous system (CNS)In the peripheral nervous system of Drosophila, Hox genes are required for sensory organ development as well as for proper formation of neuromuscular networksDuring embryogenesis of the CNS, Hox genes are involved in the establishment of regional neuronal identity, in fate specification in different segments, in regionalized programmed cell death of post mitotic neurons, and in the control of neural proliferationDuring post-embryonic development of the CNS, Hox genes are involved in limiting the proliferative potential of neuralHox genes and their cofactors are also subject to cross-regulatory interactions in neural patterning

Answer from: Quest

c is the correct answer hope this !

Answer from: Quest

interphase

the period of cell growth when the cell synthesizes new molecules and organelles. the cell is not dividing and it constitutes the majority of the time spent in the cell cycle

prophase

changes occur in the nucleus and cytoplasm. the chromatin condenses to form structures (sister chromatids) visible with a light microscope and the mitotic spindle begins to form, but the nucleus is still in tact

prometaphase

the nuclear envelope fragments and the spindle microtubules attach to the kinetochores of the sister chromatids

metaphase

all the cell's duplicated chromosomes are lined up at an imaginary plane equidistant between the poles of the mitotic spindle

anaphase

begins when sister chromatids separate from each other and ending when a complete set of daughter chromosomes arrives at each of the two poles of the cell

telophase

the daughter nuclei form at the two poles of a cell

cytokinesis

the division of a cytoplasm to form two separate daughter cells. usually occurs during telophase during mitosis. this and mitosis make up to mitotic (m) phase of the cell cycle

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A genetic change that caused a certain Hox gene to be expressed along the tip of a vertebrate limb b...