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Which of the following statements is correct? Mendel’s work demonstrated that genes are linked to similar genes.
Question 1 2 /^2 pts
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Attempt Time Score KEPT Attempt 2 55 minutes 75 out of 100 LATEST Attempt^2 55 minutes 75 out of 100 Attempt 1 37 minutes 50 out of 100
Score for this quiz: 75 out of 100
Submitted Dec 14 at 8:28pm This attempt took 55 minutes.
Dominant genes are usually linked to the male sex chromosomes. Correct! Mendel’s label of “unit factors” are what we now refer to as genes. Genetic characteristics are controlled by unit factors that exist as individual entities. Correct! False True True or False: A dominant gene will always cause the expression of a dominant phenotype in the case of complete dominance.
Question 2 2 /^2 pts
People with sickle-cell disease can become very sick under what conditions? Desert environments Correct! (^) High altitude
Question 3 2 /^2 pts
50%; A 1:2:1 ratio predicts 50% of the offspring to be heterozygotes, or medium- haired.
Question 7 6 /^9 pts
Question 6 0 / 6 pts
Consider 3 genes that assort independently in squirrels. A gene for brown color is dominant (D), a gene for a bushy tail is dominant (B), and a gene for reflux after eating acorns is recessive (a). Use the product law to predict the likelihood of producing a squirrel (from parents that are heterozygous for each trait individually) that is brown, skinny-tailed, but feels ok after eating lots of acorns. Your Answer: 3/64 that feels okay after eating lots of acorns,but brown and bushy tail (3/4) x (1/4) x (3/4) = 9/64 probability of brown, skinny- tailed, and with no reflux.
Two individuals with widow’s peaks have a child with a straight hairline. A. True or False: The gene for a widow’s peak is likely dominant? B. True or False: Assuming no codominance, you can conclude that the parents are heterozygous for a widow’s peak. C. If the child with the straight hairline someday marries a person with a straight hairline, can you predict whether their offspring will have a widow’s peak? Your Answer: A.tru e B.tru e C. no because the other parent could be heterozygous or homozygous for a straight hairline so either could be made A. True B. True C. You could predict that if the straight hairline is recessive (ww), then both parents will pass along a ‘w’ gene, thus making the child ww, and they will not have a widow’s peak.
Correct! (^) Codominance Both genes can produ Correct! (^) Genotype The two alleles carried Correct! (^) Chromosome The structure on whic Give a brief description of a karyotype and explain why it has such utility in d for deriving the chromosomes? Your Answer: its a snapshot of the chromosomes within the cell, it is a utility in diagnosing g
Question 10 6 /^6 pts
A karyotype is a microscope snapshot of the chromosomes within the cell. It is deriv X and Y Your Answer: XY male Thechromosomes are the only two chromosomes that do not need a homologous counterpart in a normal chromosome set.
Question 11 3 /^3 pts
Question 12 8 /^8 pts
Correct! Correct! Correct! Correct! Correct! Reciprocal cross Cross that switches m Gene interaction A single phenotype be Testcross Cross of unknown ge Dihybrid cross Cross that looks at tw Monohybrid cross Cross that looks at an Match each term with the correct description.
Question 14 10 /^10 pts
In a cross, the original generation is known as the generation and the first ge thegeneration. Your Answer:
Question 15 4 /^4 pts
Create a Punnett square to determine the characteristics of the F1 generation offspring, how many would you expect to have a short big toe? Your Answer: T (^) T t t this punnett square is difficiult to create i can not put the lower case t's tothe left of the box tried.
Question 16 6 /^8 pts
P
F
P1 or parental; F1 or Filial 1 Tt Tt Tt Tt
Question 18 2 /^2 pts
Which of Mendel’s hypotheses needs a correction? Make the correction.
- Genetic characters are controlled by unit factors existing in pairs in individual organisms.
- When two unlike unit factors responsible for a single characteristic are present in a single individual, one unit factor is said to be dominant to the other, which is said to be recessive.
- During the formation of gametes, the paired unit factors separate, or segregate, randomly so that each gamete receives one or the other with equal likelihood.
- During gamete formation, segregating pairs of unit factors assort in pairs. Your Answer: During gamate formation,segregating pairs of unit factors assort independently of each other
- During gamete formation, segregating pairs of unit factors assort independently to each other****.
True or False: A change in genotype will always affect a change in phenotype. True Correct! (^) False Correct! Autism Factor V Leiden Sickle-cell disease Tay-Sachs disease Which genetic disorder is characterized by a lack of activity from Hexoaminidase A?
Question 19 2 /^2 pts
The presence of normal phenotype expression even in the presence of one abno
Question 20 0 /^2 pts
Correct! (^) AB O Quiz Score: 75 out of 100
