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Triss [41]
3 years ago
8

In horses, Chesnut hair color is recessive to black. The pacing gait is recessive to trotting and long hair is recessive to shor

t hair. Cross a chestnut horse heterozygous for pacing and hair length with a hybrid horse and determine the phenotypic ratios
^^^Please help with the right answer. I will give brainliest to the right one
Biology
1 answer:
Vitek1552 [10]3 years ago
3 0

9:3: 3:1  is the phenotypic ratio showing traits as black and long hair : black and short hair: chestnut and long hair: chestnut and short hair when a chestnut horse heterozygous for pacing and hair length with a hybrid horse.

Explanation:

Dominant trait = black hair colour (BB,Bb), trotting (TT,Tt) , long hair (LL,Ll)

recessive trait = chesnut hair colour (bb), pacing gait (tt), short hair(ll)

cross between chestnut horse heterozygous for pacing and hair length will have alleles as BbLl

alleles for hybrid horse will also be heterozygous Bb, Ll

Punnett square to show the cross:

      BL         Bl       bL         bl

BL  BBLL  BBLl     BbLL    BbLl

Bl   BBLl    BBll     BbLl      Bbll

bL  BbLL  BbLl      bbLL     bbLl

bl    BbLl  Bbll       bblL        bbll

phenotype ratio

black and long hair : black and short hair: chestnut and long hair: chestnut and short hair

9:3: 3:1  is the phenotype ratio.

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1. breeding of individuals that have genes for two different characteristics:
DIHYBRID CROSS.
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"di" means having two traits involved (for example, trait A and trait B), the "hybrid" means that each trait will have two different alleles (for gene A: A or a; for gene B: B or b), one is dominant and the other is recessive.

2. a grid system used to predict possible combinations of genes due to random fertilization: PUNNETT SQUARE
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This is very useful when we are considering more than one gene,  making it less confusing.

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4. when more than two alternatives exist for a gene: MULTIPLE ALLELES
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 5.a condition in which neither pair of alleles is dominant or recessive, so the traits blend in the phenotype: INCOMPLETE DOMINANCE
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Imagine that a eukaryotic cell carries a mutation that causes the poly(a) tail to rarely be added to the primary transcripts. wh
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