PSS 3421 Final Exam 1 Questions & Answers 2024/2025
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PSS 3421
PSS 3421 Final Exam 1 Questions & Answers 2024/2025
Gender is determined in humans as: - ANSWERSXY for males and XX for females
Barr bodies are: - ANSWERSAn inactive X chromosome in females, and explains why having two X chromosomes is not harmful, and a spot seen in the nucleus of cheek ce...
PSS 3421 Final Exam 1 Questions &
Answers 2024/2025
Gender is determined in humans as: - ANSWERSXY for males and XX for females
Barr bodies are: - ANSWERSAn inactive X chromosome in females, and explains why having two X
chromosomes is not harmful, and a spot seen in the nucleus of cheek cells of human females
What is the association of the Y chromosome and gender in fruit flies? - ANSWERSGender is determined
by both the number of X chromosomes and the number of autosomes
Gender in some reptiles may be determined by: - ANSWERSThe temperature that the egg was incubated
at
Chromosomes exist in groups of how many diploid organisms? - ANSWERSTwo
In meiosis, the products: - ANSWERSAre cells that contain half the normal (somatic) number of
chromosomes
And Eventually may become egg or sperm (pollen) cells
Fill in the correct completion of the following sentence: In the cell cycle, - ANSWERScells spend most of
their time doing other things than dividing
Oogenesis means - ANSWERSthe production of egg cells
If red and white flowers are crossed and pink flowers are obtained in the F1 generation, this is called -
ANSWERSIncomplete dominance
Which of these is true of lethal alleles? - ANSWERSTheir genes code for a product that is essential for
survival
, The ABO blood group system is an example of - ANSWERSThe presence of multiple alleles of one gene
Genetic ratios in the F2, such as 9:7 or 9:3:4 are the result of - ANSWERSThe presence of two genes that
together determine the phenotype of a single trait
Mendel's 3:1 and and 9:3:3:1 ratios in the F2 mean that: - ANSWERSApproximately these ratios are
expected in the F2: chance deviation means that these ratios may be close but may not be exact
A null hypothesis is a hypothesis that: - ANSWERSNo real difference exists between the measured data
and the predicted values
The result of the chi-squared test is - ANSWERSBoth acceptance or disproof of the null hypothesis and a
probability value telling what the chance is that the results don't match the hypothesis
A p-value of 0.05 means that - ANSWERSThe observed deviation between actual and expected values
will occur by chance 5% of the time
Modern genetics began with the work of which person? - ANSWERSGregor Mendel
This work on genetics was done with which organism? - ANSWERSpeas
The traits that were part of this analysis were: - ANSWERSShape, color, and size
The four postulated that are the basis of modern genetics are called: - ANSWERSAlleles/ dominance/
segregation/ independent assortment
Which one of the following is the best answer regarding sex determination? - ANSWERSIn humans, XX is
female and XY is male
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