In an assessment of learning in Drosophila, flies were trained to avoid certain olfactory cues. In one population, a mean of 8.5 trials was required. A subgroup of this parental population that was trained most quickly (mean=6.0) was interbred, and their progeny were examined. These flies demonstrated a mean training value of 7.5. Calculate realized heritability for olfactory learning in Drosophila.

Video transcript

Hello everyone and welcome to today's video. So fishermen decided to increase the growth rate of fish in his pond. It was the longest fish by six weeks, which was 20 cm. The mean length of the fish population in the pond of this fish was 12cm. The mean length however, of the fish population in the next generation was 15cm determine the narrow sense heritability for the length of the offspring fish population. So in order to determine this narrow sense heritability, there are a few equations that we're going to be using here. We need our for service, which is going to be your selection response. And this is the mean of spring minus the overall mean. Then we have S which is our main differential, which is the mean of the parents minus the overall mean. And then we can determine or narrow sense heritability. Let's first calculate art which is going to be the mean of the offspring, which is stated to be 15 centimeters minus the overall mean, which is going to be 12 centimeters and this is going to yield three. Then we have s which is our mean differential, which is going to be the middle of the parents which we have here to be 20 centimeters minus the overall mean, which is again going to be 12 centimeters. So it's going to be eight. So our selection or or narrow sense heritability is going to be three divided by eight and this is going to be zero .375 and that is going to be represented by answer choice B. I really hope this video helped you, and I hope to see you on the next one.