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Cytic Fibrosis is caused by a recessive gene which means it will requre two copies of the same recessive gene for it to be expressed. Both parents musst therefore be carriers, or have the disease themselves.
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∙ 15y ago
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How can a child get cystic fibosis since it is a resessive gene?
Just because it is a resessive gene doesn't mean that a child cannot get CF. For example, let's do eyes. Say a mother had green eyes, and father had brown in my families case,I ended up with green eyes which is a resessive gene.
What is a reccesive gene?
an allele that is not expressed when paired with a dominant allele. Only expressed when paired with another recessive allele.
Is curly hair domant or resessive?
Dominant.
Can a child have blue eyes if both parents have brown?
98.5% of the time they have the color of the parent that has the dominate color, not the resessive unless they both have a resessive color.
What is the difference between heterozygous and homozygous alleles?
You're looking at a gene which contains 2 alleles (meaning variations of that gene). Let's call it "A."Remember that you get 2 copies of EACH gene (one from mom, one from dad).
What is the purpose of test crossing?
To determine the presence of resessive alleles. :]
Can a type 0 baby have a ab father?
No. Neither parent can be AB blood type. Each parent must have at least one resessive gene for O blood type. Either parent could be type A or B or O.
What is and example of a gene?
An example of a gene would be the X and Y chromosomes carried by the father. If the father can pass either gene to his offspring to get either a girl or a boy.
What is a example for a gene?
a man
Having dimples is an example of a phenotype which is?
a example of a gene
What is an example of a reccesive gene?
In humans, the gene that codes for the enzyme phenylalanine hydroxylase is an expmple of a recessive gene
What is a non example for a gene?
a man
