A small population of mice is released into a meadow. Many but not all of the mice survive and reproduce, and this pattern conti
nues for many generations of mice. According to Darwin's ideas about evolution, which of these conditions is necessary for natural selection to occur on the mouse population? A. Any mutations in the population do not affect the fitness of a mouse. B. The meadow provides unlimited resources to support the mice. C. Traits that affect the survival of the mice vary among individual mice. D. The environment of the meadow remains about the same from year to year.
Natural selection as proposed by Darwin is a selection pressure which operates in a population and allow the best fitted genotype to survive in changing environmental conditions and eliminate the other genotype which are not fit
Causes of natural selection include: Genetic drift, mutation(changes allelic frequency) and sexual selection
In the given example, condition necessary for natural selection to occur on the mouse population is traits that affect the survival of the mice vary among individual mice, in this condition superior genotypewill get the opportunity to reproduce and inferior genotype does not get opportunity to reproduce thus their genotype in population does not increase rapidly and hence they become eliminated leading to genetic drift
In simple words a synovial joint is a type of joint which articulates two bones and also allows movement. Six types of synovial joints occur in our body at different locations. Ball and socket joint is one of that six types of joints. It is the joint which allows maximum movement of the joining bones because this joint is formed when one bone has a spherical end like a ball and the other bone covers this ball with a cup like structure called socket. Due to such arrangements of bones the joining bones can be moved in any direction and also they can be rotated to some extent.
Progesterone, hormone secreted by the female reproductive system that functions mainly to regulate the condition of the inner lining (endometrium) of the uterus. Progesterone is produced by the ovaries, placenta, and adrenal glands
Coat color in one breed of mice is controlled by incompletely dominant alleles so that yellow and white are homozygous, while cream is heterozygous. Thecross of two cream individuals will produce <span><u>equal numbers of white and yellow mice, with twice as many creams as the other two colors.</u></span>
