Unarected Umected
daughter
Carner
daughter
Anected
son
In humans, as well as in many other animals and some plants, the sex of the individual is determined by sex chromosomes.
The sex chromosomes are one pair of non-homologous chromosomes. XX represents a female, while XY represents a male
When a gene for a specific trait is attached to the X or Y chromosome, we say it is sex-Linked, and when it is attached to the X
chromosome, we say it is X-linked. Alleles for these linked traits, such as hemophilia on color blindness, crosses, may be
recessive or dominant
This is one possible cross (above) for the X-linked condition known as hemophilia. Which pair of parents is most likely to have a
hemophiliac daughter?
Time
Remaining
00:06:49
-
carrier mother and unaffected father
5
carrer mother and hemophiliac father
opac mother and a carrier father

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

Which of the following scenarios is an example of the bottleneck effect? answers a in south africa, much of the afrikaner population is descended from a small number of dutch colonists. in this population, this is an unusually high frequency of pseudoxanthoma elasticum (pxe), an elastic tissue disorder. b four white-tailed deer are introduced to a park in finland. thirty years after their introduction scientists compare the genes in the population and find that there is no variation. c during the industrial revolution, london's air became filled with soot. as a result, birds started eating more of the lighter moths because they were easier to spot than their darker counterparts. over time, the moth population changed so that there were more darker moths than lighter ones. d 10% of the population of american alligators in an area have the recessive trait albinism. a massive flood results in the death of 80% of the population. of the remaining population, 60% have the recessive trait of albinism.

What are some characteristics of a free enterprise economy?