Deviation from Mendel

Which of the below is/are example/s of inheritance that deviates from Mendel’s law

• Linked genes

• Monohybrid

• Multiple alleles

• Polygenes

• Codominant alleles

A gene showing co-dominance has

• One allele dominant on the other

• Allele tightly linked on the same chromosome

• Alleles that is recessive to each other

• Both alleles independently expressed in the heterozygote

This is an example of…

• Monohybrid

• Multiple allele

• Dihybrid

• Codominant allele

Two antirrhinum plants with pink flowers were crossed. The F₁ generation produces has the ratio of 1 red: 2 pink: 1 white. What could be the genotype of the two plants that were used for crossing?

• RR

• Rr

• C^RC^R

• C^RC^r

ABO blood groups in humans are controlled by the gene I. It has three alleles ---- I^A, I^B, and I^O. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?

• Three

• Four

• Five

• Six

In ABO blood grouping how many genotypes show co-dominance?

• 1

• 2

• 3

• 4

Human height is controlled by more than 2 genes, which is called the polygenes. The dominant allele is the “tall” (D, E, F), while the recessive allele is “short” (d, e, f). Which of the following combination of alleles is the highest?

• ddEEFf

• DDeeff

• DDEeFf

• ddEeff

Haemophilia is a X-linked disease. The genotype of haemophilia can also represent by using pedigree diagrams. How would you describe this symbol?

• Haemophiliac male

• Carrier male

• Haemophiliac female

• Carrier female