Question

ANSWER ALL

33) In snapdragons, a cross between red and white flower color parents result in pink flowers in the F1 generation. This is an example of a) codominance b) incomplete dominance c) sex linked dominance d) autosomal dominance 34) ABO blood type is an example of what type of inheritance? a) sex-linked inheritance b) autosomal inheritance c) codominance d) incomplete dominance 35) Widow's peak is a) sex-linked inheritance b) autosomal inheritance c) cedominance d) incomplete dominance 36) The presence of dimples on one or both cheeks is dominant character a) TRUE b) FALSE 37) Red-green color blindness is inherited in an a) X-linked manner. b) Y-linked manner c) autosomal manner d) simple inheritance manner

Answer 1

Question number 33.

Answer: option b) incomplete dominance

Explanation:

Incomplete dominance is a a type of Inheritance pattern in which the dominant allele does not mask the recessive allele completely and hence, the phenotype of the organism will be a blend of both the alleles. Here, the progeny flower represent the mixture of both the alleles of the gene and therefore it is an example of incomplete dominance.

In case of codominance, both the alleles of the heterozygote are completely expressed. In sex-linked dominance, a dominant allele responsible for the disease is present on the X-chromosome. In case of autosomal inheritance, the specific gene is located on the chromosomes present in the autosomes and the dominant type represents that only one copy of the gene with mutation is enough fo the developments of disease.

Question number 34)

Answer: Codominance

Explanation:

ABO blood type is an example of codominance type of inheritance pattern because both and B alleles are completely expressed. For example, if a person is getting each A and B allele from their parents, then the person will have a blood group of AB in which both the A and B alleles are completely expressed.

Question number 35)

Answer: b) autosomal inheritance

Widow's peak hair line depends on the gene present in the chromosomes of autosomes (non-sex cells) and hence it is exhibit an autosomal inheritance pattern.

Question number 36)

Answer: a) True

Explanation: A single copy of the gene associated with dimple on an autosomal chromosome is enough for a person to have dimples on cheeks. Hence, it is a dominant trait.

Question number 37)

Answer: a) X-linked manner

Explanation: The gene causing the red-green color blindness is located on the X chromosome present in the sex-cells (allosomes). The disease is inherited in an X-linked recessive manner, in which a person will get affected genes from both the parents.