Suppose there was a mutation in the segment- polarity genes of Drosophila. What do you suppose might be the outcome?
A) Antennae will appear in a different part of their usual segment. B) Legs will appear in the place of antennae. C) Every other segment of the embryo will be missing. D) Several segments of the embryo will be missing.
The protein of the bicoid gene in Drosophila determines
A) the medial- lateral axis of the embryo. B) the anterior- posterior axis of the embryo. C) the number of segments in the embryo. D) the ventral- lateral axis of the embryo.
A) differentiated cells may contain embryonic mRNAs. B) genetic information is retained in mature plant cells. C) genetic information is lost during plant development. D) plants can reverse the differentiation process.