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1. Polydactyly is caused by a dominant allele, D. The recessive allele of the gene is represented by d. Use one genetic diagram to show the inheritance of the polydactyly gene by R and S.

P generation Father (P) Mother(Q)

Phenotype Polydactyly Normal

Genotype Dd dd

Gamete D d d d

Fertilization

Punnett Square for F1 generation

F/M

d<...

Answered by Suman C. • Biology tutor

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what is the total resistance of 2 resistors each with resistance 2 ohms in parallel?

1/R_t= 1/R₁ + 1/R₂ The equation for resistors in parrallel. If R₁and R₂are both 2 ohms then 1/R_t = 1/2 +1/2 = 1 so R_t = 1 ohm....

Answered by Hermione W. • Physics tutor

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Solve: 3x + 4 = x + 12

In this algebraic problem, we are faced with two unknowns (x's) on both sides of the equation. Remember that what we do to one side, we must also do to the other side. So to tackle this, we will first foc...

Answered by Tristan F. • Maths tutor

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What is the significance of the colour 'red' in Steinbeck's 'Of Mice and Men'?

The colour red was used to symbolise Curley's wife. It is described that her nails, dress and other physical characteristics as being red. This portrays her character as perhaps being quite promiscuous an...

Answered by Perle B. • English Literature tutor

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What causes a heart attack (also known as mycocardial infarction) and how are they treated?

During an individuals life arteries become covered in fatty plaque deposits. This causes the the inside (lumen) of the arteries to narrow. This narrowing increases the likelyhood of blockage of platelets ...

Answered by Saskia C. • Biology tutor

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