PLEASE ANSWER ALL PARTS. Thank you 1) Choose the correct term to complete each o
ID: 273515 • Letter: P
Question
PLEASE ANSWER ALL PARTS. Thank you
1) Choose the correct term to complete each of the following statements about X inactivation.
1. A female has one X chromosome and (Click to select) one Barr body two Barr bodies zero Barr bodies three Barr bodies .
2. A male has one X chromosome and (Click to select) three Barr bodies two Barr bodies one Barr body zero Barr bodies .
3. With respect to the expression of X-linked genes, females are (Click to select) hermaphrodites genetic mosaics pseudohermaphrodites .
4. A female carrier of an X-linked trait who expresses the phenotype is called a (Click to select) pseudohermaphrodite Barr body genetic mosaic manifesting heterozygote .
5. The gene that controls X inactivation is the (Click to select) MECP2 XIST Barr SRY gene.
2) What would be the result if X-inactivation did not occur?
Men would need to increase expression of genes on the Y chromosome.
Women would have twice the amount of genetic material as men.
3) Choose the correct term to complete each of the following sentences.
1. The continued development of external and internal reproductive structures in response to hormones determines an individual's (Click to select) chromosomal sex phenotypic sex gonadal sex gender identity .
2. A person's attraction to individuals of the same or opposite sex is his or her (Click to select) phenotypic sex gender identity sexual orientation gonadal sex .
3. (Click to select) Gender identity Sexual orientation Gonadal sex Chromosomal sex is based on the development of a testis or ovary from an early undifferentiated structure.
4. Feelings or being male or female describe an individual's (Click to select) sexual orientation phenotypic sex chromosomal sex gender identity .
5. An individual's (Click to select) phenotypic sex chromosomal sex gender identity gonadal sex is based on his or her combination of X and Y chromosomes.
Men would express genes on the X chromosome at twice the level that women do.
Women would express genes on the X chromosome at twice the level that men do.
4) Match the type of inheritance with the statements about the molecular basis of inheritance.
A. Pattern baldness in humans occurs from an allele that is dominant in males and recessive in females. (Click to select) Simple Mendelian inheritance Codominance Sex-influenced inheritance Incomplete dominance X-linked inheritance
B. A woman who is heterozygous for the recessive hemophilia gene does not exhibit the disease. Her sons, but not daughters, inherit the disease. (Click to select) Simple Mendelian inheritance X-linked inheritance Sex-influenced inheritance Codominance Incomplete dominance
C. A woman passes on the genes specifying heavy beard growth to her sons, despite not having a beard herself. (Click to select) X inactivation Sex-limited inheritance Simple Mendelian inheritance Y-linked inheritance Sex-influenced inheritance
D. Bulls that mate with a cow which produces milk that is low in saturated fat play their part in transmitting the mutation despite not producing milk themselves.
(Click to select) Sex-influenced inheritance X-linked inheritance Simple Mendelian inheritance Sex-limited inheritance Incomplete dominance
Explanation / Answer
1.A female has one X chromosome and one Barr body .
2.A male has one X chromosome and zero Barr bodies.
3.Gonadal sex is based on the development of a testis or ovary from an early undifferentiated structure.
4.Feelings or being male or female describe an individual's gender identity
5.An individual's chromosomal sex is based on his or her combination of X and Y chromosomes.
a.Pattern baldness in humans occurs from an allele that is dominant in males and recessive in females Sex-influenced inheritance
b.A woman who is heterozygous for the recessive hemophilia gene does not exhibit the disease. Her sons, but not daughters, inherit the disease. X-linked inheritance
c.A woman passes on the genes specifying heavy beard growth to her sons, despite not having a beard herself. Sex-limited inheritance
d.Bulls that mate with a cow which produces milk that is low in saturated fat play their part in transmitting the mutation despite not producing milk themselves. Sex-limited inheritance
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