Genetics Question (Potentially Dumb)

[Spot & Bubby]

This is probably trivial:

In one of our sets of cows (about 90 head), all calves have one of two nose colors with the exception of three black-nosed calves. None of the cows with black-nosed calves have black noses. Only one of the bulls bred to those cows has a black nose. Is it safe to assume the black-nosed bull sired the three black-nosed calves, or would a supporting trait be needed?

 

[TexasJerseyMilker]

what breed?

 

[Spot & Bubby]

what breed?

Red Angus Simm Angus

 

[NIdahoShorthorns]

Black hair would typically grow from black skin. And black is almost always dominant or co-dominant, so I would say it's safe to say the black nosed bull is the sire.

 

[Spot & Bubby]

Black hair would typically grow from black skin. And black is almost always dominant or co-dominant, so I would say it's safe to say the black nosed bull is the sire.

The calves don't have black hair.

 

[ClinchValley86]

The calves don't have black hair.

short from a DNA test, I'd run off the assumption that he is the SIRE

Sidenote --- Reds with the black nose... I like those a lot.

 

[coachg]

short from a DNA test, I'd run off the assumption that he is the dam.

Sidenote --- Reds with the black nose... I like those a lot.

I hope you meant sire ?

 

[Spot & Bubby]

short from a DNA test, I'd run off the assumption that he is the dam.

Sidenote --- Reds with the black nose... I like those a lot.

My annual bonus is my pick of the calf crop. There are 3 cows I want a heifer from. The heifer pictured was a contender before she was born, because of her mother. I also think she's beautiful.

 

[NIdahoShorthorns]

The calves don't have black hair.

Cool calf. Shorthorns occasionally turn up with black noses too. I don't know what breeds the other bulls are but it could creep in from a lot of places.

 

[Spot & Bubby]

Cool calf. Shorthorns occasionally turn up with black noses too. I don't know what breeds the other bulls are but it could creep in from a lot of places.

They are all Mushrush Simmangus

 

[ClinchValley86]

I hope you meant sire ?

Makin sure you were paying attention. We blame that on spellcheck.

 

[coachg]

Makin sure you were paying attention. We blame that on spellcheck.

I totally understand. I read my twice and still make mistakes

 

[NIdahoShorthorns]

They are all Mushrush Simmangus

Those bulls would have black noses in their backgrounds too through the red angus. Genetics are funny and recessive genes can lurk around a long time before presenting themselves. But I'd still bet the black nose came from the black bull and the red hair is from a co-dominant gene.

 

[Spot & Bubby]

I appreciate ya'll for indulging me. As I said, this is not a super serious topic. I don't think my description was clear. Let's try photos, shall we?

Momma (Sandy):



Suspects:
1

2


3

4

5


Once again, the heifer calf: