How many alleles are there for eye color?
Eye color was traditionally described as a single gene trait, with brown eyes being dominant over blue eyes. Today, scientists have discovered that at least eight genes influence the final color of eyes.
Can a couple who both have brown eyes have a child with blue eyes Punnett Square?
If both of you have brown eyes, then there is generally a 25% chance that the baby will have blue eyes if both of you carry the recessive blue-eye gene. But if only one of you has a recessive blue-eye gene, and the other has two brown, dominant genes, then there is a less than 1% chance of the baby having blue eyes.
How do you determine your eye color?
There are two main factors that help determine your eye color: the amount and pattern of dark brown pigment (called melanin) in the part of your eye called the iris and the way in which the iris scatters light that passes through the eye. The more important factor is pigment, which is determined by your genes.
How to do the Punnett square worksheet 1?
Punnett Square Worksheet 1 Punnett Square Worksheet 1 Directions: Read each problem carefully. Make a “key” for the trait, identify the parents involved in the cross and the gametes each parents produces. Show the Punnett square and give the ratio of both genotype and phenotype.
Which is dominant in Punnett square white or purple?
Punnett Square Practice Worksheet Punnett Square Practice Worksheet Name: 1) For each of the genotypes (AA, Aa or aa) below determine what the phenotype would be. Purple flowers are dominant to white flowers. PP PURPLE Pp PURPLE pp WHITE
Where do you put the gametes in the Punnett square?
On one axis of the Punnett square you put the two possible gametes for the male. Repeat this for the other axis for the possible female gametes. Since she is “bb” you must put “b” and “b”. Step 3: During fertilization sperm meets the egg. The Punnett square show us the various possibilities during fertilization.