Humans that are XXYâ¦
a. Will be male in all aspects including having testes
b. Will be female in all aspect including having ovaries
c. Will have hermaphroditic gonads, but will appear either male or female as adults
d. Will have male gonads, but will appear female on all secondary sex traits (wrong answer)
The role of estrogen isâ¦
a. Primary and secondary sex determination in females
b. Secondary sex determination in females
c. Secondary sex determination in both males and females
d. Primary sex determination in females, and secondary sex determination in both sexes (wrong)
As in most aspects of development, genes can play multiple roles depending on when and where they are expressed. Which gene is involved in primary sex determination of one sex, and secondary sex determination in the other:
a. Sry (wrong)
b. Sox9
c. beta-catenin
d. estrogen receptor
Humans that are XXYâ¦
a. Will be male in all aspects including having testes | ||
b. Will be female in all aspect including having ovaries | ||
c. Will have hermaphroditic gonads, but will appear either male or female as adults | ||
d. Will have male gonads, but will appear female on all secondary sex traits (wrong answer) |
The role of estrogen isâ¦
a. Primary and secondary sex determination in females | ||
b. Secondary sex determination in females | ||
c. Secondary sex determination in both males and females | ||
d. Primary sex determination in females, and secondary sex determination in both sexes (wrong) |
As in most aspects of development, genes can play multiple roles depending on when and where they are expressed. Which gene is involved in primary sex determination of one sex, and secondary sex determination in the other:
a. Sry (wrong) | ||
b. Sox9 | ||
c. beta-catenin | ||
d. estrogen receptor |
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According to the multiplication rule of probability, the chance of crossing two pea plants that are heterozygous for height and have none of four offspring showing the recessive short phenotype is:A. ¼ à ¼ à ¼ à ¼. B. ¾ à ¾ à ¾ à ¾. C. (¼ à ¼ à ¼ à ¼) + (¾ à ¾ à ¾ à ¾). D. ¼ + ¼ + ¼ + ¼. E. None of the above. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Females inherit X-linked traits from their maternal parent only. | ||
Females can inherit a gene for an X-linked trait from either parent. | ||
Males inherit X-linked traits from their paternal parent only. | ||
Males can inherit a gene for an X-linked trait from either parent but normally inherit it from their fathers. |
Males can inherit a gene for an X-linked trait from either parent but normally inherit it from their fathers. |
1. A mother with blood type A has a child with blood type A. Give all possible blood types for the father of this child.
a.) O | |||||||||||||||||
b.) B, AB | |||||||||||||||||
c.) A, AB | |||||||||||||||||
d.) A, B, O | |||||||||||||||||
e.) A, B, AB, O 2.) In sesame, the one-pod condition (P) is dominant to three-pod (p), and normal leaf (W) is dominant to wrinkled (w). These characteristics assort independently. A one-pod, wrinkled leaf à one-pod, normal leaf cross gave a progeny of 654 one-pod, normal leaf plants and 224 three-pod, normal leaf plants. What are the likely genotypes of the parents in this cross?
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3.) Honeybees have a haplo-diploid sex determination system where females develop from a fertilized egg (they are diploid, having one allele from the female queen and one allele from the male), and males develop from unfertilized eggs (they are haploid, having only one allele from the queen). Assuming that the queen is heterozygous for a particular gene, what is the probability that a female will inherit the recessive allele from her mother? What is the probability that a male will inherit a recessive allele from his mother?
a.) The probability that a daughter will inherit a recessive allele from her mother is 50%; the probability that a son will inherit a recessive allele from his mother is 100%. | ||
b.) The probability that a daughter will inherit a recessive allele from her mother is 100%; the probability that a son will inherit a recessive allele from his mother is 50%. | ||
c.) The probability that a daughter will inherit a recessive allele from her mother is 50%; the probability that a son will inherit a recessive allele from his mother is 50%. | ||
d.) The probability that a daughter will inherit a recessive allele from her mother is 100%; the probability that a son will inherit a recessive allele from his mother is 100%. |
4.) Human males, with XY chromosomes are _____ and produce two different kinds of gametes, whereas females with XX chromosomes are _____ and produce only one kind.
a.) | homogametic; heterogametic | |
b.) pleiotropic: epistatic | ||
c.) heterogametic; homogametic | ||
d.) epistatic; pleiotropic |
5.) A chi-square test is done to test the hypothesis that a set of data represents a F2 ratio of 9:3:3:1. The degree(s) of freedom that should be used is:
a.) 1 | ||
b.) 2 | ||
c.) 3 | ||
d.) 4 I DON'T KNOW HOW TO DO THESE PROBLEMS, I WOULD REALLY APPRECIATE SOME HELP AND EXPLANATION ON HOW TO WORK OUT THESE PROBLEMS. THANK YOU VERY MUCH!!! |