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How is it that a parent can have a gene but not have the phenotype that gene is code for?
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Morphological expression of a gene?
Phenotype
What type of blood would you have if parents are o negative and a positive?
There is no single answer to this question.First, some definitions. PHENOTYPE is how the trait is physically displayed in the person, so the parents in this case have the phenotypes O and A. GENOTYPE is the pair of genes that a person carries that determines their phenotype. A RECESSIVE gene is one "trumped" by a DOMINANT gene in the genotype; for blood typing, O is the recessive gene and A and B are dominant. For a person to show the recessive phenotype, they must carry BOTH recessive genes; so, a person with type O must carry two O genes, genotype "OO".OK, now for our situation. The O parent has genotype OO, as explained above, and so can ONLY pass on the O gene. The type A parent, however, can have genotype AA or AO. Because the A gene is dominant, with the AO genotype the parent is still type A but can pass on EITHER the A gene or the O gene. The child can therefore end up with phenotype AO and be type A or OO and be type O. If exactly one-half of people with type A blood have genotype AA and one-half have AO, the probability of this child being type A is 75%.For the Rh factor (positive and negative), positive is the dominant trait and negative is recessive. The A- parent must be genotype -/- and can only pass on the - gene. The O+ parent can be +/+ or +/- and can pass on either gene, same situation as above. Again, if people with Rh type positive are split exactly 50/50 in genotypes, this child has a 75% chance of being positive.
What an organism looks like as a result of a gene is called?
a phenotype is the physical characteristics of an organism based on its genotype.
Which gene mutation is less likely to result in a phenotype change and why?
phylogeny
What is the original source of all the different alleles of a genes?
A mutation in a pre-existing gene. If the mutation effects the phenotype derived from the gene, it is determined to be a different allele. Mutations can be small (such as a single nucleotide polymorphism) or large (such as entire genome duplication).
There or more forms of a gene that code for a single trait are called?
phenotype
What does an allele code for?
It is the phenotype of a genotype...meaning, it is the actual- physical look of a specific gene not the gene sequence.
What is a genotype for the first parent?
well, genotype can be the two alleles for any given gene, while phenotype is the actual (observable) expression of that gene.
What term is used for an organism that has a particular gene that has a particular gene but does not show its effects?
phenotype
What is recessivr allele?
For a recessive allele to produce a recessive phenotype, the individual must have two copies, one from each parent. An individual with one dominant and one recessive allele for a gene will have the dominant phenotype.
Different forms of gene?
Alleles are the different types of genes.
The physical expressions of a gene are known as an organism's?
The phenotype of the organisms. The physical and behavioral traits of the organism.
What is The expression of a gene is called?
The expression of a gene is called the phenotype.
If two genes in a gene pair are for the same trait what will that trait be?
The question should be "If two alleles for a gene are the same, what phenotype will the organism have?" Answer: If the two alleles are for the dominant phenotype, the organism will exhibit the dominant phenotype. If the two alleles are for the recessive phenotype, the organism will have the recessive phenotype.
Morphological expression of a gene?
Phenotype
How does a gene contribute to the expression of a phenotype?
The combination of genes tell what phenotype will be projected
Is the gene type a person has called their phenotype?
Not exactly. The phenotype is an organism's physical appearance.
