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3. The table below lists some dominant and recessive traits and their alleles.

\begin{tabular}{|c|c|}
\hline
Trait & Allele \\
\hline
Peaked hairline (widow's peak) [tex]$(P)$[/tex] & Straight hairline [tex]$(w)$[/tex] \\
\hline
Free ear lobes [tex]$(F)$[/tex] & Attached ear lobes [tex]$(f)$[/tex] \\
\hline
Mid-digital hair present [tex]$(M)$[/tex] & Mid-digital hair absent [tex]$(m)$[/tex] \\
\hline
Shortened fingers (brachydactyly) [tex]$(B)$[/tex] & Normal length fingers [tex]$(b)$[/tex] \\
\hline
Normal pigmentation [tex]$(A)$[/tex] & Pigmentation lacking (albinism) [tex]$(a)$[/tex] \\
\hline
Non-red hair [tex]$(R)$[/tex] & Red hair [tex]$(r)$[/tex] \\
\hline
Normal secretions [tex]$(C)$[/tex] & Cystic fibrosis [tex]$(c)$[/tex] \\
\hline
Dwarf stature (achondroplasia) [tex]$(D)$[/tex] & Average stature [tex]$(d)$[/tex] \\
\hline
Rhesus positive [tex]$(Rh+)$[/tex] blood [tex]$(D)$[/tex] & Rhesus negative [tex]$(Rh-)$[/tex] blood [tex]$(d)$[/tex] \\
\hline
\end{tabular}

Referring to the table, determine the genotype(s) of an individual with the following traits:

a. Widow's peak
b. Normal secretions
c. Red hair
d. Dwarf stature
e. Straight hairline
f. Free earlobes
g. Normal length fingers



Answer :

GinnyAnswer
Sure, let's identify the genotypes of an individual with the given traits, based on the table provided.

### a. Widow's Peak
Widow's peak (peaked hairline) is a dominant trait denoted by [tex]\(P\)[/tex]. Since it is a dominant trait, the individual can have either two dominant alleles ([tex]\(PP\)[/tex]) or one dominant and one recessive allele ([tex]\(Pw\)[/tex]). Therefore, the genotype is:

Genotype: PP or Pw

### b. Normal Secretions
Normal secretions are controlled by a dominant allele [tex]\(C\)[/tex]. Like other dominant traits, this individual can either have two dominant alleles ([tex]\(CC\)[/tex]) or one dominant and one recessive allele ([tex]\(Cc\)[/tex]). Thus, the genotype is:

Genotype: CC or Cc

### c. Red Hair
Red hair is a recessive trait denoted by [tex]\(r\)[/tex]. For the trait to manifest, the individual must possess two recessive alleles. Therefore, the genotype is:

Genotype: rr

### d. Dwarf Stature
Dwarf stature (achondroplasia) is a dominant trait represented by [tex]\(N\)[/tex]. This individual can have either two dominant alleles ([tex]\(NN\)[/tex]) or one dominant and one recessive allele ([tex]\(Nn\)[/tex]). Thus, the genotype is:

Genotype: NN or Nn

### e. Straight Hairline
Straight hairline is a recessive trait denoted by [tex]\(w\)[/tex]. Thus, the individual must have two recessive alleles for this trait to manifest. Therefore, the genotype is:

Genotype: ww

### f. Free Earlobes
Free earlobes, controlled by the dominant allele [tex]\(F\)[/tex], indicate that the individual can either have two dominant alleles ([tex]\(FF\)[/tex]) or one dominant and one recessive allele ([tex]\(Ff\)[/tex]). Thus, the genotype is:

Genotype: FF or Ff

### g. Normal Length Fingers
Normal length fingers is a recessive trait denoted by [tex]\(s\)[/tex]. The presence of this trait indicates that the individual must have two recessive alleles. Therefore, the genotype is:

Genotype: ss

Here is the summary of the genotypes for each trait:

- a. Widow's Peak: PP or Pw
- b. Normal Secretions: CC or Cc
- c. Red Hair: rr
- d. Dwarf Stature: NN or Nn
- e. Straight Hairline: ww
- f. Free Earlobes: FF or Ff
- g. Normal Length Fingers: ss

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