Answer:
Serovars
Explanation:
Serovars refer to the different strains of a species of microbe that differ from each other with respect to the antigenic composition of a specific structure such as polysaccharides of the cell wall. Serovars are identified suing appropriate antiserum.
For example, the bacterial species <em>Streptococcus pneumoniae</em> have as many as 90 serovars that differ from each other with respect to antigens present in their capsules. These different serovars are identified by using antiserum for specific capsular types which in turn would induce capsular swelling.
Answer:
C. "Because you have had one child with Tay-Sachs, you must each carry the allele. Any child you have has a 25% chance of having the disease
Explanation:
Tay-Sachs disease is an autosomal recessive disorder that means a child will acquire the phenotype or we can say disease only when both the alleles which cause disease are present in the child.
Here, in this condition neither parent has Tay-Sachs but they gave birth to a child who is suffering from the disease then it simply means that both the parents are carrier of this disease i.e. they both are heterozygous.
The cross and probability of healthy and diseased child is shown as under:
Mother Father
Parents Tt Tt
/ | | \
Off-springs TT Tt Tt tt
<u>Out of these 4 probable off-springs only 3 with genotype TT, Tt & Tt will be healthy while the 1 with genotype tt will be diseased.</u><u> </u><u>So, the probability of diseased child is 1/4 which is 25%. </u>
Also, the birth of children is an independent event so if one child has already been born with this disease then it doesn't mean that the next 3 children will be healthy for sure i.e. birth of first child cannot influence the next child. In short we can also say that in the next birth, there is still 25% chance of the child being born with this disease because previous birth has nothing to do with next birth.
What are the chances that their offspring will have sickle cell anemia?
100%
Answer:
B
Explanation:
Here are five of the most notable vestigial organs in humans:
The Appendix, the tailbone, Mail nipples, Erector Pili and Body Hair, Wisdom Teeth.
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Hope this can help you. Have a nice day!
