contestada

In some cattle, the genes for red hair and for white hair are codominant. Cattle with alleles for both red and white hair have both red and white hairs. This condition is referred to as roan. What is the probability, expressed as a fraction, of a red cow and a roan bull having a roan offspring?
A. 3/4
B. 4/4
C. 1/2
D. 1/4

Respuesta :

xxamari

Answer:

C. 1/2

Explanation:

Please see the attached Punnett square and probability.

1/2 = 2/4

Ver imagen xxamari

Co-dominant genes are the condition in which both the alleles from the parents are expressed equally resulting in heterozygous offspring. Hence dominant and recessive genes are expressed together.

The probability of roan offspring is:

Option C.  [tex]\dfrac{1}{2}[/tex]

The probability can be expressed as:

  • The allele of Purebred dominant Cow = RR

  • The allele of co-dominant heterozygous Roan Bull = Rr

See the attached image for the cross below.

According to the cross, 50% of offspring will have the gene for red hair and the other 50% will be roan.

  • Offspring with red  (RR) hair = 2

  • Offspring with white and red hair (Rr) = 2

Thus, 50% of offspring will be roan.

To learn more about co-dominant follow the link:

https://brainly.com/question/7209443

Ver imagen aliasger2709

Otras preguntas