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Scott, MIT Graduate
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Experience:  MIT Graduate (Math, Programming, Science, and Music)
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Please help. Just need to clarify my answers for these 9 questions. Chromosomes

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Please help. Just need to clarify my answers for these 9 questions.

Chromosomes that occur in pairs and code for the same traits are called _____________ chromosomes; these do not include the __________________ chromosomes which code for gender.
homologous; autosomes
autosomes; homologous
diploid; haploid
homologous: sex
sex; autosomes

18. Parents with the dominant phenotype cannot have offspring with the recessive phenotype.
True because the dominant gene must be passed down from each parent.
True because at least one dominant gene will be passed down from each parent.
False because one parent could carry the recessive allele.
False because both parents could carry the recessive allele.
True because both parents have the dominant allele.

19. Morgan breeds and sells snakes. He knows that he can make the most money by breeding and selling albino snakes. Albinism is a recessive trait. His female albino corn snake just produced 6 offspring. Two displayed normal coloration and 4 were albino. What do you know about the genotype of the baby snakes with the normal coloration?
They must be homozygous dominant.
They must be homozygous recessive.
They must be heterozygous.
They could be either heterozygous or homozygous dominant.
There is not enough information to determine their genotype

20. If a homozygous black bull is mated with a homozygous white cow and the calf is gray, this would be an example of ___________. However, if the calf has black and white spots this would be an example of _______________.
incomplete dominance; a sex-linked trait
incomplete dominance; codominance
codominance; homology
complete dominance; polygenic trait
a sex-linked trait; a recessive trait

21. A man with blood type A and a woman with blood type B can have a baby with blood type O blood.
True because A and B are the dominant blood types and both individuals could carry a type O allele.
False, the child must have type AB blood.
False because A and B are codominant.
False because Type A and B are dominant blood types and these individuals cannot have an offspring with the recessive blood type.
True because only 1 O allele is needed.

22. Sickle cell disease is caused by a single mutation in the DNA of a particular gene. A person with this disease has red blood cells that lose their original donut shape and form a sickle shape. People with this disorder suffer from low energy levels, blood clots, and strokes. This is an example of
a multifactorial trait.
polygenic inheritance.
incomplete dominance.

23. Which of the following is NOT true with regard to the law of segregation? (Points: 4)
Each individual has 2 factors for each trait.
Genes segregate during gamete formation.
Gametes contain only 1 gene from each pair.
During fertilization, each new individual obtains 2 genes for each trait.
Each gamete contains 2 genes for each trait.

24. When two alleles of the same gene are identical, the individual carrying those alleles is said to be

25. Skin color is coded for by several different genes which results in a range of skin colors from very dark to very light. This is an example of ________________.
polygenic inheritance
incomplete dominance
the rule of multiplication
Submitted: 5 years ago.
Category: Homework
Expert:  Family Physician replied 5 years ago.
You said that you needed to clarify your answers. I don't see your answers. If you provide your answers, I will be happy to check them for you.

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