Which best defines a dominant trait?
Dominant: A genetic trait is considered dominant if it is expressed in a person who has only one copy of that gene. (In genetic terms, a dominant trait is one that is phenotypically expressed in heterozygotes).
What are linked genes quizlet?
define linked genes. genes located near each other on the same chromosome than tend to be inherited together in genetic crosses; such genes are said to be genetically linked.
When Gregor Mendel crossed true breeding tall plants with true breeding short plants Why was it impossible to observe segregation group of answer choices?
Biology 2nd semester final
| Question | Answer |
|---|---|
| Organisms that have two identical alleles for a particular trait are said to be | Homozygous |
| When Gregor Mendel crossed true breeding tall plants with true breeding short plants, all the offsprings were tall because | The allele for tall plants is dominant |
What do the letters R and I represent in Figure 11 7?
Infer What do the letters R and I represent in figure 11-7? They represent dominant and recessive alleles.
Could Figure 14 6 show the pattern for the transmission of color blindness?
Could Figure 14-6 show the pattern for the transmission of colorblindness? Yes, because the father is passing his colorblind x-linked trait to his daughters, making them carriers, and the boys are getting their colorblind x-linked trait from the carrier mother.
When geneticists look at genotype What are they really studying?
Mendel’s hereditary “factors” are variants of genes called alleles. Genotype describes the combination of alleles that an individual has for a certain gene, while phenotype describes the traits that you can see.
Can As marry AA?
It is safe for someone with AS to marry someone with AA genotype. Two sickle cells should not even have a relationship or get married. Individuals with the AA genotype should help you prevent genetic abnormalities by marrying the AS, AC, and SS. Compatible genotypes for marriage are: AA marries an AS.
Can a person genotype change?
Genotype generally remains constant from one environment to another, although occasional spontaneous mutations may occur which cause it to change. However, when the same genotype is subjected to different environments, it can produce a wide range of phenotypes.
Is it possible for AA and as to give birth to SS?
A woman with an AA genotype cannot give birth to an SS child even if she sleeps with the founder of Sickle cell”. The other kids are AS and AA.”
What is the advantage of AA genotype?
From our previous article on the various types of Genotype and blood group here, we can deduce that Genotype AA has the uttermost advantage when it comes to choosing a partner for copulation and reproduction( read on choosing a life partner here), People with genotype AA can reproduce with any other genotypes with …
Does negative sickling mean AA?
These tests have limits in what they can show. “Sickling test” cannot tell what types of Hb are in a person’s blood. It just tests for the abnormal behaviour of Hb S – the sickle Hb. Sickling test is “negative” in people who do not make Hb S; they could be AA, AC, or have any abnormal Hb condition that is not S.
Can sickling be cured?
Stem cell or bone marrow transplants are the only cure for sickle cell disease, but they’re not done very often because of the significant risks involved. Stem cells are special cells produced by bone marrow, a spongy tissue found in the centre of some bones.
What blood type is sickle cell trait?
It is an inherited condition in which both hemoglobin A and S are produced in the red blood cells, always more A than S. Individuals with sickle cell trait are generally healthy.