Question

tongue-rolling ability is a dominant trait, which is represented by t. complete the following table using the correct terms with the information about tongue rolling.

individual	dominant/recessive trait	alleles	homozygous/heterozygous
rolls tongue	select choice	select choice	heterozygous
does not roll tongue	select choice	select choice	select choice
	select choice	tt	select choice

Explanation:

Step1: Analyze TT row (Homozygous/Heterozygous)

TT has two identical dominant alleles, so it's homozygous dominant. So for the "Homozygous/Heterozygous" column and "Rolls tongue" (TT) row, select "Homozygous".

Step2: Analyze TT row (Dominant/Recessive trait)

Since T is dominant, TT shows the dominant trait. So select "Dominant".

Step3: Analyze TT row (Alleles)

TT has alleles TT, so the allele combination is TT (already given, but for the dropdown, confirm it's TT - but since the cell is TT, maybe the dropdown for the "Rolls tongue" (first one) allele? Wait, the first "Rolls tongue" individual with alleles TT: alleles are TT, so the "Alleles" column for first "Rolls tongue" is TT.

Step4: Analyze Tt row (Alleles)

Tt has alleles T and t, so select "Tt" (but the cell is Tt, so that's filled). For "Homozygous/Heterozygous", Tt has different alleles, so "Heterozygous".

Step5: Analyze "Does not roll tongue" row (Alleles)

To not roll tongue, the trait is recessive, so alleles must be tt (since recessive trait is expressed only in homozygous recessive). So select "tt" for alleles.

Step6: Analyze "Does not roll tongue" row (Dominant/Recessive trait)

Recessive trait, so select "Recessive".

Step7: Analyze "Does not roll tongue" row (Homozygous/Heterozygous)

tt is homozygous recessive, so select "Homozygous".

Step8: Analyze "Select Choice" for individuals:

• First "Rolls tongue" (TT): rolls tongue (dominant), homozygous dominant, alleles TT.
• Second "Rolls tongue" (let's say Tt): rolls tongue (dominant), heterozygous, alleles Tt.
• "Does not roll tongue": tt, recessive, homozygous recessive, does not roll.

Now, filling each dropdown:

1. First "Rolls tongue" (Individual): Rolls tongue (already label, but the dropdown for Dominant/Recessive: Dominant. Alleles: TT. Homozygous/Heterozygous: Homozygous.
2. Second "Rolls tongue" (Individual with Tt): Dominant (since T is dominant), Alleles: Tt, Homozygous/Heterozygous: Heterozygous.
3. "Does not roll tongue": Alleles: tt, Dominant/Recessive: Recessive, Homozygous/Heterozygous: Homozygous, Individual: Does not roll tongue.

Let's structure each cell:

• First "Rolls tongue" (top row, first):
• Dominant/Recessive: Dominant
• Alleles: TT
• Homozygous/Heterozygous: Homozygous
• Second "Rolls tongue" (top row, second):
• Dominant/Recessive: Dominant (since Tt has dominant allele T)
• Alleles: Tt
• Homozygous/Heterozygous: Heterozygous
• "Does not roll tongue":
• Dominant/Recessive: Recessive
• Alleles: tt
• Homozygous/Heterozygous: Homozygous
• Individual: Does not roll tongue (already label)

Now, for the "Select Choice" dropdowns:

• First "Rolls tongue" (Dominant/Recessive): Dominant
• First "Rolls tongue" (Homozygous/Heterozygous): Homozygous
• Second "Rolls tongue" (Dominant/Recessive): Dominant
• Second "Rolls tongue" (Alleles): Tt (but the cell is Tt, so that's set)
• Second "Rolls tongue" (Homozygous/Heterozygous): Heterozygous
• "Does not roll tongue" (Dominant/Recessive): Recessive
• "Does not roll tongue" (Alleles): tt
• "Does not roll tongue" (Homozygous/Heterozygous): Homozygous

Answer:

Filling the table as follows (key selections):

• First "Rolls tongue" (Dominant/Recessive): Dominant
• First "Rolls tongue" (Homozygous/Heterozygous): Homozygous
• Second "Rolls tongue" (Dominant/Recessive): Dominant
• Second "Rolls tongue" (Homozygous/Heterozygous): Heterozygous
• "Does not roll tongue" (Dominant/Recessive): Recessive
• "Does not roll tongue" (Alleles): tt
• "Does not roll tongue" (Homozygous/Heterozygous): Homozygous

(Note: The exact dropdown options should match these terms based on Mendelian genetics: dominant/recessive, homozygous/heterozygous, alleles tt for non - roller, TT or Tt for roller.)