Genetics Answers

A tall plant was grown in nutrients deficient soil and remained dwarf. When it is crossed with dwarf plant then how many will be tall and how many will be dwarf??

A woman with hemophilia (a recessive, sex-linked condition) has a son with hemophilia. The son marries a woman whose father has hemophilia, but she does not.
What is the probability that a daughter of this mating will be a hemophiliac?
A son?
If the couple has 3 sons what is the probability that all of them will NOT be hemophiliacs?

Elaine and Jerry each have a sibling with sickle-cell disease. Neither Elaine, nor Jerry, nor any of their parents has the disease, and none of them has been tested to reveal sickle-cell trait. Based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease.

What would the results be from a cross between a plant of genotype RrAa and one of genotype RRaa

In humans, if P represents the dominant allele for extra fingers and toes (polydactyly) and p is the recessive 5-fingered allele, which of these genotypes would indicate a person with five fingers?

1. The genetic disease called cystic is inherited through a recessive gene. If both parents are heterozygous for this trait. What is the probability that they will have a child who suffers from this diseas?

A child has a cleft chin, with a dominant condition, but does not know their genotype. Well the father is heterozygous for the cleft chin trait, and the mother does not have a cleft chin. Determined through a Punnett square, what is the child's genotype?

In certain cats, tail can be long, manx (no tail), or in the case of the heterozygous condition, short. What is the probability that many offspring are produced if a short tailed cat is bred with a manx cat?v

You order a PCR primer from Eurofins Genomics. They deliver a tube with 35 nmoles of DNA
in it. How much TE buffer do you need to turn it into a 100 µM freezer stock? Which pipettor
should you use? To what should it be set?

An individual has the following genotype: AABbDdeeFfGghh. How many unique gametes can
they form?