This question involves a single gene coding for the ability to taste the chemical PTC. The allele coding for the ability to taste (T) is dominant over the allele coding for the inability to taste (t). This means that an heterozygous individual will have the ability to taste PTC.

According to this question, if two heterozygous tasters (Tt) cross to have a large family i.e. Tt × Tt, the following gametes will be produced by each parent;

Tt = T and t

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

TT, Tt, Tt - Tasters (3/4 or 75%)

tt - Non-taster (1/4 or 25%)

Note that based on the question asked, there is a 75% probability that their first child will be a taster because there is equal segregation of alleles into gametes.

3 0

3 years ago

Suppose an astronomer discovers a large, spherical-shaped body orbiting the sun. The body is composed mostly of rock, and there

Ratling [72]

Answer: The body discovered is Planet

Explanation:

A planet is an astronomical body orbiting a star (sun) usually rocky like in nature that is massive enough to be rounded by its own gravity.

7 0

4 years ago

What did the structure of dna's double helix suggest about dna's properties? select all that apply. select all that apply. dna c

soldier1979 [14.2K]

Yes all information about DNA above is right , DNA stores biological information in sequences of four bases of nucleic acid — adenine (A), thymine (T), cytosine (C) and guanine (G) — which are strung along ribbons of sugar- phosphate molecules in the shape of a double helix.Dna store information which is dependent on genetic code , which dependent on the genetic code. The code which define relation between the sequence of bases in DNA (or its mRNA transcript) .Every cell in the human body carries a bundle of DNA in its nucleus — nearly 30,000 genes, and the chunk fromdna become proteins.. Each of the 46 chromosomes in a human cell’s nucleus bears thousands of genes.

7 0

3 years ago