A chesnut coat color of horses is due to a receissive gene, while the dominant a

Question

A chesnut coat color of horses is due to a receissive gene, while the dominant allele results in black. The pacing gait is due to a recessive gene, whereas the dominant allele results in the trotting gait. show the od offspings tha could result from corss of balck trotter male heterozyhous , for both genes, wiht a chestnut pacer female.

Gnotype for balck?

male genotypes? male possble gemets?

female genotypes and possible gements?

gentypic and phynotipic ratio ?

% of offsrings that will exivit both domiant tarits?

% of offspings that will exibit chestnut traits?

what are the chances of having a chestnut horse that paces ?

Explanation / Answer

Answer:

Black = B; Chesnut=b

Trotting gait = T; Pacing trait= t

balck trotter male heterozyhous (BbTt) x chestnut pacer female (bbtt)---Testcross

Male parent produces only one type of gametes, bt.

Female parent produces four types of gametes, BT, Bt, bT & bt.

Phenotypic ratio = 1:1:1:1

Genotypic ratio = 1:1:1:1

Both dominant traits = 25% (black, trotter)

Chestnut = 50% (chestnut, trotter (25) & chestnut, pacer(25%))

Chestnut, paces = 25%

bt BT BbTt (black, trotter) Bt Bbtt (balck, pacer) bT bbTt (chesnut, trotter) bt bbtt (chesnut, pacer)

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