Answer :Aneuploidy often results in serious problems such as Turner syndrome, a monosomy in which females may contain all or part of an X chromosome. Monosomy for autosomes is usually lethal in humans and other animals. Klinefelter syndrome is a trisomy genetic disorder in males caused by the presence of one or more X chromosomes. The effects of trisomy are similar to those of monosomy. Down syndrome is the only autosomal trisomy in humans that has a substantial number of survivors one year after birth. Trisomy in chromosome 21 is the cause of Down syndrome; it affects 1 infant in every 800 live births
Explanation:
A. theory because it is an explanation that is supported by extensive observations, experimentation, and reasoning.
Explanation:
Evolution can best be described as a theory because it is an explanation that is widely supported by extensive observations, experimentation and reasoning.
Theories are formulated after careful observation into a particular phenomenon.
- Most theories provides a vivid explanation into an observed event or process.
- The theory of evolution is one of such theories that suggests that an organism changes in order to adapt to its environment.
- Some of the key figures who contributed to the study of evolution are J. B Lamarck, Charles Darwin, Williams Smith e.t.c
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Answer:
c. a trait with four alleles
Explanation:
Answer
In any society the number of children produce depend upon the following factors:
1. desire for large families
2. prevalent child mortality
3. knowledge- knowledge on to use family planning, available options, side effects and migration measures, available services and cost.
4. access to quality family planning services
The role of children in society as future providers for family is an important determinant of fertility rate. Africa is still poor under developed and primarily an agrarian/rural society. Mortality rates are also high for children and adults. As a result women tend to produce more child as they know that some of them will die during childhood or adulthood.
Slime molds have the ability to move.