The f2 progeny from a particular cross exhibit a modified dihybrid ratio of 9: 7 (instead of 9: 3: 3: 1). what phenotypic ratio would be expected from a testcross of the f1 progeny

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Human genes only differ by less than percent. a. 1 b. 6 c. 11 d. 16