Mann-Whitney Test and Confidence Intervals in Redback Spiders Experiment

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As cells that lead to eggs and sperm get older, we’d expect them to accumulate more ______, which are passed on to daughter cells.

mutations

The idea that DNA damage and poor repair are the main source of de novo mutations does not help us understand why we observe ______ bias in the first place.

sperm

The research team was led by Felix Wu, a graduate student at Columbia University in New York City, and Molly Przeworski, a ______ there.

professor

Molly was utterly uninterested in ______ or science in school.

math

The initial stages of oogenesis (egg production) occur during fetal development before ______.

birth

Biologists like Felix, Molly, and their colleagues will have even more data to home in on the processes that lead to mutations, tracing genetic variation back to its original ______.

source

The Mann-Whitney test looks at whether two samples are likely to come from sources with the same ______

median

The p value of this test indicates the probability that the two samples come from sources with the same ______

median

There is a very slight trend towards more eggs and heavier egg sacs resulting from cannibalistic matings, but this difference is not ______

significant

This contradicts hypothesis 1. Hypothesis 2 – Did eating a mate decrease the odds that a female would mate again with a different ______?

male

Apparently, skipping breakfast leaves female redbacks interested in a ______

snack

Hypothesis 3 – Does self-sacrifice pay off with ______?

paternity

So if brown beetles consistently leave more offspring than green beetles because of their color, you’d say that the brown beetles had a higher ______.

fitness

In evolution, fitness is about success at surviving and reproducing, not about exercise and ______.

strength

A genotype’s fitness depends on the environment in which the organism ______.

lives

The fittest genotype during an ice age is probably not the fittest genotype once the ice age ______.

is over

Fitness is a handy concept because it lumps everything that matters to natural selection (survival, mate-finding, reproduction) into one ______.

idea

The fittest individual is not necessarily the strongest, fastest, or ______.

biggest

Females choose which males to ______ with

mate

Some females can eject ______ from an undesirable mate

sperm

Artificial selection is when people select which organisms get to ______

reproduce

Farmers have cultivated many crops from wild mustard by artificially selecting for certain ______

attributes

Humans further selected subsets of dogs, creating Great Danes, Chihuahuas, and the full ______ of more than 450 breeds

gamut

Domestic dogs evolved from ancient, now-extinct wolf ancestors tens of thousands of years ______

ago

Elaine Ostrander and her team study dogs to answer basic questions about genetics with implications for human health. Who is also an author on the study but not pictured?

Falina Williams

In one study, Elaine Ostrander and her team focused on sport hunting dogs, a group that includes spaniels, retrievers, and __________.

hunting dogs

Elaine Ostrander's team identified 59 genes that seemed to have been the targets of recent selection in sport hunting dogs. Who was part of the team?

Jaemin Kim, Falina Williams, Dayna Dreger, Jocelyn Plassais, Brian Davis, and Heidi Parker

The focus during the development of different dog breeds was on traits like swimming skills and rat-catching ability. Which dogs were bred for pulling fishing nets?

Chesapeake Bay Retrievers and Portuguese Water Dogs

One of the traits focused on during the development of dog breeds was clearing out pests. This led to the creation of the __________ breed.

Rat Terrier

Scientists in recent decades have been able to track down some of the genes selected for in different dog breeds. Who is a biologist at the National Institutes of Health known for this work?

Elaine Ostrander

Explore the application of Mann-Whitney test and confidence intervals in a study comparing the number of eggs and weight of egg sacs in redback spiders. Learn about interpreting confidence levels and p-values in statistical analysis.

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