Chapter 14 Case Study: Genetic dwarfism Seven months pregnant, an expectant mother was under-going a routine ultrasound. While p
rior tests had been normal, this one showed that the limbs of the fetus were unusually short. The doctor suspected that the baby might have a genetic form of dwarfism called achondroplasia. He told her that the disorder was due to an autosomal dominant mutation and occurred with a frequency of about 1 in 25,000 births. The expectant mother had studied genetics in college and immediately raised several questions. How would you answer two of them? 1. How could her baby have a dominantly inherited disorder if there was no history of this condition on either side of the family? 2. Is the mutation more likely to have come from the mother or the father?
1.) Achodroplasia is a autosomal dominant disorder, the suspected case suggested that inorder for the parents to produce and offspring with achondroplasia. One parents must have a single mutant gene of achodroplasia to be inherited by his offspring. for this case, It is suggested that the offspring might have developed its own mutant gene as it only affect 1 in 25,000 birth. There is changes of genes during early development.
2.) The mother said that they don't have that history of disorder. again, it's autosomal dominant disorder. one parents must have that kind of disorder so their child can also inherit it. Thus, no of the childs parents is a carrier.
The correct answer is option e. "higher water content".
Explanation:
One of the features that make endospores resistant to high heat in its low water content. The cortex of the endospore osmotically removes the water from the interior of the endospore, condition that protects them from heat and radiation. The wimP spores that can be killed by boiling water most likely have a higher water content in comparison to wild-type endospore. This explains why wimP spores are susceptible to be killed with the heat generated by boiling water.
Flowers are living plants that grow if they have water and sun 2. without a lot of sun the flower will not be able to grow as tall and properly 3. flowers have a certain part that the bees collect to there hive in order to keep there colony growing 1.cones have a certain shape that make them easier to identify them from other parts of nature 2. Pine cones only come from pine trees, although all conifers produce cones. 3. Gymnosperms are a group of plants who have naked seeds, not enclosed in an ovary. 1. spores may consist of one or several cells (but do not contain an embryo) and are produced in large numbers 2. Some germinate rapidly, others 'rest', surviving unfavorable environmental conditions. 3.Spores are formed by ferns, horsetails, mosses, fungi and bacteria.
