Question

A farmer crossed a roan cow with a red cow. Predict the phenotype of the offspring and thier phenotype ratio: (a) Parent1 ________ (b) Parent 2 ________ (c)Offspring _______ (d) Phenotype ratio________ (e) Pattern of inheritance __________​

Answer 1

i hope it will be helpful to you

Answer 2

When a roan cow is crossed with a red cow then the offspring are -

(a) Parent 1 - Roan cow with alleles Rr  

 (b) Parent 2 - Red cow with alleles RR   

(c) Offspring - half red, half roan cows.  

(d) Phenotypic ratio - 1:1    

(e) Pattern of inheritance - Codominance

Explanation:

CODOMINANCE -

• The codominant pattern of inheritance violates the law of dominance.
• Both the alleles express and show phenotypic traits in a heterozygous condition.
• The offspring produce has traits that are neither dominant nor recessive.
• Both the alleles show genotypic expression in the offspring.
• Example - In ABO blood grouping in the heterozygous condition of blood type AB, both the alleles express themselves.
• Example - When a roan cow is crossed with a red cow, the offspring produced show a 1:1 ratio of both roan and red physical appearance.
• The cross will produce offspring as -