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# What would the offspring be if 2 roan cows were crossed?

Updated: 9/15/2023

Wiki User

12y ago

There wouldn't be any offspring. A cow cannot mate with a cow to get a calf. You must mate a cow with a BULL to get a calf.

So, if the question were reworded to: "What would the offspring be if a roan cow was crossed with a roan bull?" or vice versa, then we could answer it this way:

Roan colouration in Shorthorns is a codominant trait, which means that one allele is not dominant nor recessive over another. So, the resulting offspring of a roan cross would be a mix of red calves, white calves, and roan calves.

The Punnet Square reveals the probability of one of three coat colours occurring in the subsequent cross:

Let R = red and W = white and RW = roan.

RW bull x RW cow gives us:

1 RR

2 RW

1 WW

In other words, there's a 25% chance that the resulting calf would be red, a 50% chance that the resulting calf would be roan, and a 25% chance that the calf could be white.

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12y ago

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Q: What would the offspring be if 2 roan cows were crossed?
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### A red bull when crossed with white cows always produces roan-colored offspring explain how the colors for red roan and white are inherited?

This phenomena is called incomplete dominance. Neither red nor white in this case is dominant to the other. You can also see this when breeding a Charolais (white) to an Angus (black) The offspring are kind of grey.

### What color will the calves be and in what proportion from a herd of white cows and a roan bull?

In a herd of Shorthorn cattle where the herdbull is roan and the cows are all white, it is probable that the resulting offspring from these crosses will yield 50% white calves and 50% roan calves.

### Which cross will produce only horned roan offspring in cattle?

The cross that will produce only horned Roan offspring in cattle is the red bull with the white cow. However, these offspring would be able to create either red, white, or Roan.

### Do red cows and blue cows make purple cows?

No they don't. Besides, two cows that mate cannot produce offspring. Either one or the other has to be a bull, not another cow. See, cow + bull = calf. Besides, blue cattle don't exist, if you're not including the blue roan colouration. If you are, then a blue-roan cow bred to a red bull would likely produce a black calf, or even a speckled-roan calf. But never a purple calf.

### What would be the offspring be if a roan cow and a white bull were bred together?

The offspring produced is dependent on chances. We can figure out the chances of the kind of offspring such a cross will get by using a Punnett square. Unfortunately the WYSIWYG format on this site will not allow for such a square, so we will give the ratio, the genotypic and phenotypic percentages that such a cross will receive. Let R = red, W = white and RW = roan. Roan cow (RW) x White bull (WW) Offspring: 2 RW : 2 WW Genotypic ratio: 50% roan and 50% white Phenotypic ratio: Same as above. Thus, the offspring of a roan cow crossed with a white bull (presumably of the same breed, being Shorthorn), may come out as white or roan. There is a 50% chance that either will occur.

### When roan color in cattle is the result of incomplete dominance between red and white color genes how would one produce a herd of pure breeding roan colored cattle?

It's simply not possible. When you breed a roan cow to a roan bull you only have a 50% chance of producing roan offspring, a 25% chance of producing white offspring and a 25% chance of producing red offspring. You have a much higher chance of producing a pure breeding red or white herd than a roan-coloured herd.

### What does codominonce mean in geneticists?

Codominance is a condition where heterozyous alleles at the same site produce and intermediate result. Ex. Red flowered plant crossed with White flowered plant yields 100% Pink flowered offspring. Ex. White Shorthorn cow crossed with Red Shorthorn yields 100% roan offspring.

Codominance.

### When roan color in cattle is the result of incomplete dominance between red and white color genes how would one produce a herd of pure-breeding roan-colored cattle?

Genetics is a tricky thing and there are no 100% guarantees that you will get the color you want. That being said the best possible way that this might be achieved would to test the genetics of each breeding pair. And continue to breed a successful pair, but have a care not to over breed them. A roan will not necessarily produce another roan either. Any born not of the color you want test to make sure of the genetics and decide to keep and breed or sell. It would take years of careful screening, breeding, trials and errors and disappointments. But with patience and persistence I believe that it would be possible. :)

### What color foal should you have between a blueroan horse and chestnut?

A true blue roan is a black horse with the roan gene. In order for the horse to be black it has to be aa at the agouti site and either Ee or EE at the extension site. aaEeRn- or aaEERn- the second allele at the roan site is unknown. The chestnut horse has to be ee at the extention site. Unfortunately, without some knowledge of the colors of the parents of both these horses it will be difficult to determine the probability of color. We do know that there is a minimum of a 50% chance that any foal produced will be roan. (If both parents of the roan are roans themselves there is a potential for the roan horse to be RnRn.) If the roan parent is RnRn any foal produced from this mating would be roan. We also know that, if the blue roan is Ee at the extension site there is a 50% chance that any foal produced will be chestnut (whether with or without roaning). (If either of the blue roan's parents were chestnut we would know that the roan parent is Ee.) We know that the blue roan is aa at the Agouti site, but without further study of the chestnut's parents, grand parents and her and their offspring it would be difficult to know if the mating could produce a Bay (A). If the chestnut parent is Aaee 50% of the non chestnut foals will be Bay and 50% will be black. Hope this helps.

### Explain why it would be impossible to develop through breeding a stain of roan cattle or pink four-o'clocks?

Because there's always a chance of roan cows and roan bulls and pink four-o'clocks producing red and white calves as well as roan calves and white and red four-o'clocks as well as pink four-o'clocks, respectively. If you do a punnet square on either of these crosses, you will get the following: (Let's use the example of roan cows and bulls since this is in the Cattle Breeding category) RR = red WW= white RW = roan RW bull x RW cow makes: 1-RR 2-RW 1-WW This means you have a 25% chance of getting a red calf, a 25% chance of getting a white calf, and a 50% chance of getting a roan calf. No matter how many filial levels you make with these crosses, you will ALWAYS get this chance and this number, no matter what. This is what Incomplete Dominance is about: the Dominant allele is never dominant, and the recessive allele is never recessive.