Genetics Answers

In peas Tall (T) is dominant over dwarf (t), Yellow is dominant over green (y), and smooth (S) is dominant over wrinkled (s).What fraction of the offspring in the following cross would be homologous recessive for all gene pairs in the cross: YyTtss X YyttSs ?

Two parents with cleft chins, both heterozygous for cleft chin (Cc), have three children with cleft chins. The parents are sure that their fourth child will not have a cleft chin. Draw a Punnett Square to see if this is possible.
Determine the probability that the fourth child will have a cleft chin.


Using Models: What information does a Punnett square give? Does the Punnett square support the parents' prediction? Explain your answer.
Predicting: If these parents have a fifth child, what are the chances that the child will have a cleft chin? Explain your answer.

Describe how aneuploids are formed

A gene is found on the X chromosome of humans. A recessive allele leads to loss of the gene function. Using a notation that distinguishes a normal X chromosome and a mutated X chromosome, indicate the genotype of an affected male, a normal male, an affected female, a normal female who carries the mutation, and normal female who can have all normal sons. Try the same exercise for a mutated allele that is dominant over the normall allele.

A disease is caused by a recessive allele,d. Diseased individuals are thus homozygous recessive dd. What are the genotypes of the parents of a diseased child? Explain your answer.

in population that is in hardyweinberg equilibrium the friqvency of a recacive allile for a certain arridatary trait is 0.20 what % of the indivisaul in the next genration would be acepted to show the dominent trait

Who were darwins influences And what did they say?

If the parents are RrFf x RrFf

what is the fraction of the offspring will be tongue rollers and have free earlobes?
What is the fraction of the offspring will be non-rollers and have free earlobes?
What is the fraction of the offspring will be tongue rollers and have attached earlobes?

Why haemophilia raises in women as compared to men? Reason.

You are studying a population of 5000 winged Fargles. There are 3200 green Fargles and 1800 purple Fargles. Calculate p and q for the population