Body axis development is determined by a MATERNAL EFFECT gen…

Body axis development is determined by a MATERNAL EFFECT gene in Drosophila. A dominant Bicoid gene allele is required to set up the correct axis development in flies. The bb (two loss of function alleles) genotype is LETHAL in this MATERNAL EFFECT gene. A female Drosophila had all dead offspring, caused by Bicoid loss of function. What is this female fly’s GENOTYPE?

Yumi’s therapist is using Applied Behavior Analysis. He is t…

Yumi’s therapist is using Applied Behavior Analysis. He is trying to teach Yumi to brush her teeth on her own. The first few times, he rewards Yumi just for holding the toothbrush. Then Yumi gets a reward for moving the toothbrush around her teeth using only water to brush. Finally, Yumi is rewarded only if she uses toothpaste on her brush and brushes all of her teeth. Yumi’s therapist is using which of the following?