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TLS Online TPP Program

#Question id: 32221

Which of the following statements is correct regarding mutations in the LDL receptor (LDLR) gene in patients with familial hypercholesterolemia?

#Unit 2. Cellular Organization
  1. Abolishes the ability of the LDL receptor to be incorporated into coated pits.
  2. Prevents the LDL receptor from properly folding in the endoplasmic reticulum, leading to its degradation.
  3. Disrupts the binding of LDL to the LDL receptor.
  4. Impairs the recycling of the LDL receptor, causing it to be degraded instead of being reused. 
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TLS Online TPP Program

#Question id: 26792

#Unit 8. Inheritance Biology

If an F1 plant (Rr) is backcrossed to the parent with round seeds and wrinkled seed, what proportion of the progeny will have wrinkled seeds from both?
TLS Online TPP Program

#Question id: 26793

#Unit 8. Inheritance Biology

The probability of rolling one die and obtaining a four. To calculate the probability of rolling a die twice and obtaining 2 fours, What is the probability of rolling a four on both is?
TLS Online TPP Program

#Question id: 26794

#Unit 8. Inheritance Biology

Genes are located close together on the same chromosome are called__
TLS Online TPP Program

#Question id: 26803

#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?
TLS Online TPP Program

#Question id: 26804

#Unit 8. Inheritance Biology

In goats, a beard is produced by an autosomal allele that is dominant in males and recessive in females. If  cross the beardless female with heterozygous beard male, what will be the proportion of female beard in F1 generation?
TLS Online TPP Program

#Question id: 29096

#Unit 8. Inheritance Biology

When a homozygous plant that produces purple fruit (PP) is crossed with a homozygous plant that produces white fruit (pp), all the heterozygous F1 (Pp) produce violet fruit If an F1 eggplant is used in a testcross, what proportion of the progeny from this cross will be white?