Complete question:
A female is born with attached earlobes, which is a recessive phenotype. Which of the following statements about her parents must be true?
a. neither has the codominant allele.
b. Her father has an inactivated allele.
c. Both parents have the recessive allele.
d. Her mother carries the dominant allele.
Answer:
c. Both parents have the recessive allele.
Explanation:
A recessive trait is expressed in homozygous recessive genotypes only. If a female expresses the attached earlobe phenotype, she should be homozygous for the allele since the attached earlobe is a recessive trait. If allele "a" gives attached earlobe phenotype in homozygous genotype, the genotype of the female would be "aa". This means that the female has got one copy of the allele "a" from her either parents. Therefore, both her parents should have at least one copy of the recessive allele "a".
Answer:
9:enforcement terrorism, 10:true,11:true
Answer:
the first option is correct. two types of weathering are physical / mechanical weathering and chemical weathering.
Explanation:
Answer:
By using a catalyst.
Explanation:
A Catalyst lowers the activation energy needed for a reaction.
Answer:
This is possible by mating the domestic dog with the gray wolf. Explanation is given below.
Explanation:
- A Species can be defined as a group of individuals which are capable of producing fertile offspring by undergoing sexual interaction with each other, that is, they are capable of inter-breeding.
- In order determine whether domestic dog and gray wolf belong to the same species, male and female individual from each of the group are interbred with each other.
- If the mating gives rise to fertile offspring, then domestic dog and gray wolf would belong to the same species.
- If no fertile offspring is generated by the mating then the domestic dog and the gray wolf belong to two different species.
- This is because Reproductive Isolation prevents inter-species breeding.
