Question

You have two homozygous puffskein strains. One has blue fur CbCb the other has yellow fur...

You have two homozygous puffskein strains. One has blue fur CbCb the other has yellow fur CyCy and you use these for the following crosses. Identify the pattern of inheritance that follows each cross.

-A CbCb x CyCy cross produces offspring with varying colors ranging from blue to greenish-yellow

-A CbCb x CyCy cross produces all yellow offspring

-A CbCb x CyCy at room temperature produces all blue offspring, but the same cross at 37 degrees celsius all are yellow

-A CbCb x CyCy cross produces all green offspring

-A CbCb x CyCy cross produces 75% blue, 25% yellow

-A CbCy x CbCy cross produces 2/3 blue, 1/3 yellow

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Answer #1

1. It is a type of polygenic inheritance because a range of multiple phenotypes is produced and all the phenotypes are similar to one another.

2. It is a complete dominance type of inheritance and yellow is dominant over blue.

3. This type of inheritance is dependent upon temperature. The colour of the offspring is dependent upon the temperature in which the offspring is living.

4. The type of inheritance is showing incomplete dominance. Blue colour is incompletely dominant over yellow colour and heterozygotes are therefore green in colour.

5. This type of inheritance it showing complete dominance and blue is dominant over yellow.

6. This is lethal allele inheritance. The combination is CbCb is lethal.

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