WW
Wonder woman
Answers (3)
WW
Answered
Thigh muscles that attach to the medial side of the pelvis ________ the thigh at the hip joint.
A) flex
B) adduct
C) extend
D) abduct
E) abduct and rotate
A) flex
B) adduct
C) extend
D) abduct
E) abduct and rotate
On Sep 29, 2024
B
WW
Answered
Which of the following is not true of the hormone TSH?
A) It is synthesized by the anterior pituitary gland.
B) Its target is the thyroid gland.
C) It stimulates the release of thyroid hormones.
D) Due to negative feedback, a low level of thyroid hormones will inhibit the release of TSH.
E) All of these are true of the hormone TSH.
A) It is synthesized by the anterior pituitary gland.
B) Its target is the thyroid gland.
C) It stimulates the release of thyroid hormones.
D) Due to negative feedback, a low level of thyroid hormones will inhibit the release of TSH.
E) All of these are true of the hormone TSH.
On Sep 26, 2024
D
WW
Answered
Height is a quantitative trait, meaning that genes at several loci contribute to the phenotype. Does this mean that any two individuals in a population that differ in height also differ in the alleles they carry?
On Sep 22, 2024
Height is indeed a quantitative trait, which means it is influenced by multiple genes, each contributing a small amount to the overall phenotype, as well as by environmental factors. This polygenic inheritance means that the trait is controlled by several different genes located at different loci on various chromosomes.
When two individuals in a population differ in height, it is likely that they have differences in some of the alleles they carry at the loci that contribute to height. However, it is not necessarily the case that they differ in all of the alleles related to height. There are several reasons for this:
1. **Common Alleles**: Some alleles may be very common in the population and thus shared by many individuals, regardless of their height differences.
2. **Environmental Factors**: Height is not solely determined by genetics. Environmental factors such as nutrition, health during key growth periods, and overall lifestyle can have significant impacts on an individual's final height. Therefore, two individuals with the same genetic potential for height could end up with different heights due to environmental differences.
3. **Different Allele Combinations**: Due to the polygenic nature of height, there are many different combinations of alleles that can result in similar or different heights. Two individuals may share some alleles at certain loci but have different alleles at others, leading to different heights.
4. **Epistasis**: Interactions between genes, known as epistasis, can also affect height. An allele at one locus may influence the expression of alleles at another locus, which can complicate the relationship between genotype and phenotype.
5. **Pleiotropy**: A single gene can have multiple effects on different traits (pleiotropy). Therefore, an allele that influences height might also affect other traits, and selection for those traits could indirectly influence the distribution of height alleles in the population.
In summary, while individuals who differ in height are likely to have some differences in the alleles they carry at height-related loci, it is not a strict one-to-one relationship. The complex interplay of multiple genes and environmental factors means that two individuals of different heights could share many alleles in common, and conversely, individuals of similar height could have different genetic makeups.
When two individuals in a population differ in height, it is likely that they have differences in some of the alleles they carry at the loci that contribute to height. However, it is not necessarily the case that they differ in all of the alleles related to height. There are several reasons for this:
1. **Common Alleles**: Some alleles may be very common in the population and thus shared by many individuals, regardless of their height differences.
2. **Environmental Factors**: Height is not solely determined by genetics. Environmental factors such as nutrition, health during key growth periods, and overall lifestyle can have significant impacts on an individual's final height. Therefore, two individuals with the same genetic potential for height could end up with different heights due to environmental differences.
3. **Different Allele Combinations**: Due to the polygenic nature of height, there are many different combinations of alleles that can result in similar or different heights. Two individuals may share some alleles at certain loci but have different alleles at others, leading to different heights.
4. **Epistasis**: Interactions between genes, known as epistasis, can also affect height. An allele at one locus may influence the expression of alleles at another locus, which can complicate the relationship between genotype and phenotype.
5. **Pleiotropy**: A single gene can have multiple effects on different traits (pleiotropy). Therefore, an allele that influences height might also affect other traits, and selection for those traits could indirectly influence the distribution of height alleles in the population.
In summary, while individuals who differ in height are likely to have some differences in the alleles they carry at height-related loci, it is not a strict one-to-one relationship. The complex interplay of multiple genes and environmental factors means that two individuals of different heights could share many alleles in common, and conversely, individuals of similar height could have different genetic makeups.