Analyzing rates of twin births

Reference no: EM1382111

Researchers (Helle et al., 2004) analyzed rates of twin births in the Sami population of Northern Scandinavia during the eighteenth and nineteenth centuries. They found that (1) a baby born from a singleton pregnancy was more likely to survive to adulthood than a baby born from a twin pregnancy, and (2) the average number of offspring raised to adulthood was higher for women who had twins than for those who never had twins. These data suggest that in this population , human twinning rate was

a. under direction selection

b. under stabilizing selection

c. under disruptive selection

d. under sexual selection

e. undergoing genetic drift

Reference no: EM1382111

Questions Cloud

Calculate the quotas redistributive effect : Calculate the quota's redistributive effect, consumption effect, protective effect, and revenue effect and what is the overall welfare loss to Venezuela as a result of the quota?

Gender and racial diversity in organization : Illustrate out the degree to which there is gender and racial diversity in your organization. More specifically, you are to examine the degree of diversity of the people in the "leadership" positions relative to the rest of the workforce.

Compare changes in the carbon cycle : Compare changes in the carbon cycle to that of the nitrogen cycle on human health. Create a conceptual graphical model for how changing the carbon cycle is likely to impact human health.

We-versus-me orientation : Apply the communication competence model to the jury in the movie. Concentrate on the We-versus-Me orientation, skills and knowledge, appropriateness and effectiveness, sensitivity, commitment, and ethics.

Analyzing rates of twin births : Researchers analyzed rates of twin births in the Sami population of Northern Scandinavia during the 18th and 19th centuries.

Create program to keep track of game collection : You wish to create a program which will keep track of the game collection at home. The program must recognize the platform.

Determining trends in criminal statistical data : Critically discuss the trends in criminal statistical data over the last 40 years? Have the trends of violent and non-violent crime have increased, decreased or remained relatively constant over the past four decades?

Recognizing and avoiding bias : A researcher has deep religious faith. Part of this faith is the belief that homosexuality is against God and God's teachings. The researcher is part of the research team working together on grant-funded project focusing on adjustment of children ..

Modellling the current and future landscapes : Using models like the above we can model current and future landscapes E.g. models for future forest types. Here is where parameters like global change, CO2 etc. are entered into the equation. How do ecosystems change with succession?

User Account

All Pages