Exam 9: Patterns of Inheritance

Two pea plants are mated that are heterozygous for height where the tall (T )trait is dominant to short plants (t),and flower color where white flower color ( p)is recessive to purple flower color (P).What is the ratio that one would expect in their offspring?

Temperature can affect phenotype.

You are considering the inheritance of some human traits.One trait controls the quality of earwax,and it is controlled by the E gene.Wet earwax is dominant to dry earwax.Another trait is free or attached earlobes,represented by the A gene.Attached earlobes are recessive to free earlobes.Assume that a man who was pure-breeding for dry earwax and free earlobes had children with a woman who was pure-breeding for attached earlobes and wet earwax.What would be the genotype of their offspring?

The expressed characteristics of an organism are known as its ________.

An allele is

Two humans mate who are heterozygous for earlobe shape where attached earlobes (A)are dominant to free earlobes (a),and earwax quality where dry earwax (e)is recessive to wet earwax (E ).What is the probability that their first child will have dry earwax and attached earlobes?