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TLS Online TPP Program

#Question id: 29004

Inhibition of PTH secretion by a step manner, select the correct sequences of PTH inhibition?

#Unit 7. System Physiology – Animal

  1. Ca2+ binds to the receptor → extracellular Ca2+ concentration is increased → activates PLC → inhibits PTH secretion

  2. intracellular Ca2+ concentration is increased → binds to the receptor→ activates PLC → inhibits PTH secretion

  3. extracellular Ca2+ concentration is increased → binds to the receptor→ activates PLC → inhibits PTH secretion

  4. extracellular Ca2+ is decreased decreased → Ca2+ binding to the receptor  → inhibits PTH secretion
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TLS Online TPP Program

#Question id: 19120

#Unit 8. Inheritance Biology

Trisomy 18 is one of the most common trisomies observed in human populations. You prepare DNA samples from two unrelated infants, both with trisomy 18, and from their parents. You then type the infants and their parents for four SSRs distributed along chromosome 18:
 

                                      
In which parent did nondisjunction occur in Family 1?
TLS Online TPP Program

#Question id: 19121

#Unit 8. Inheritance Biology

Trisomy 18 is one of the most common trisomies observed in human populations. You prepare DNA samples from two unrelated infants, both with trisomy 18, and from their parents. You then type the infants and their parents for four SSRs distributed along chromosome 18:
 

                                              
In which parent did nondisjunction occur in Family 2?
TLS Online TPP Program

#Question id: 19122

#Unit 8. Inheritance Biology

Trisomy 18 is one of the most common trisomies observed in human populations. You prepare DNA samples from two unrelated infants, both with trisomy 18, and from their parents. You then type the infants and their parents for four SSRs distributed along chromosome 18:
     
             
                                         
In which division of meiosis did nondisjunction occur in Family 2?
TLS Online TPP Program

#Question id: 24564

#Unit 8. Inheritance Biology

A one type of nondisjunction leads to regions of tissue with different chromosome constitutions, a condition known as
TLS Online TPP Program

#Question id: 24565

#Unit 8. Inheritance Biology

A particular trait that are determined by autosomal genes and are inherited according to Mendel’s principles, this particular trait has higher penetrance in one of the sexes is known as
TLS Online TPP Program

#Question id: 24566

#Unit 8. Inheritance Biology

In some sheep, the presence of beard is produced by an autosomal allele that is dominant in males and recessive in females. A beard female is crossed with a homozygous beardless male. One of the resulting F1 females is crossed with a beardless male. What proportion of the male and female progeny from this cross will have beard in F2 generation?