In a species of tomato plants, height is determined by a single gene (H). The tall allele (H) is completely dominant to the short allele (h). Which table shows the genotypic probab... In a species of tomato plants, height is determined by a single gene (H). The tall allele (H) is completely dominant to the short allele (h). Which table shows the genotypic probability for two heterozygous tall plants being crossed? Which species shares the most recent common ancestor with a crocodile?
Understand the Problem
The question is asking for the genotypic probability of two heterozygous tall tomato plants (Hh x Hh) and the relationship of species in a phylogenetic tree. It requires understanding of genetics regarding allele dominance and interpretation of evolutionary relationships.
Answer
Table C and snake.
The correct genotypic probability table is C: 25% HH, 50% Hh, 25% hh. The species sharing the most recent common ancestor with a crocodile is a snake.
Answer for screen readers
The correct genotypic probability table is C: 25% HH, 50% Hh, 25% hh. The species sharing the most recent common ancestor with a crocodile is a snake.
More Information
In the genetic cross, a Punnett square shows a 1:2:1 ratio typical for heterozygous crosses. In the phylogenetic tree, crocodiles and snakes both belong to the reptile lineage.
Tips
A common mistake is not using a Punnett square for allele distribution. Also, misreading branches in a phylogenetic tree can lead to incorrect conclusions.
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