I'm trying to finish this online course before my time on it runs out. Does anyone know the answers to these questions?
Multiple Choice
1. The result of one human cell after meiosis is
two identical cells
four cells, each with half the number of chromosomes as the parent
four cells, each with forty-four autosomes and two sex chromosomes
one cell with an extra twenty-first chromosome
2. A gamete is defined as
a sex cell
having forty-four autosomes and two sex chromosomes
a normal body cell
chromosomal separation in mitosis
3. During metaphase I of meiosis I
the chromosomes line up single file in the center of the cell
chromosomes pull apart
DNA replicates
chromosomes line up across from their homologue
4. What organisms did Gregor Mendel do his experiments on?
rabbits
fruit flies
pea plants
mice
5. A trait that is not expressed when paired with a dominant allele is the definition of
recessive
dominant
heterozygote
homozygote
6. Describe the following genotype: Aa
homozygous recessive
dominant, recessive
heterozygous
homozygous dominant
7. The physical expression of a gene is the definition of
dominant
recessive
genotype
phenotype
8. In the trait for pea shape, round is dominant over wrinkled. What are the genotype possibilities and ratio for the following cross: Rr x Rr?
3 round: 1 wrinkled
1 RR: 2 Rr: 1 rr
2 Rr: 2 rr
4 Rr = 4 round
9. The heterozygous individual for an autosomal dominant trait
is a carrier
does not have the disorder
has the disorder
is immune to the disorder
10. The heterozygote of red/white flower color which was co-dominant would be
white
red and white
red
pink
11. The heterozygote of red/white flower color which was incompletely dominant would be
white
red and white
red
pink
12. A characteristic that is derived from many genes is called
a polygenic trait
co-dominant
incompletely dominant
multiple alleles
13. Which of the following traits cannot be studied using normal dominance in humans?
eye position
earlobe shape
dimples
height
tongue rolling
14. Tall is dominant over short for plant height. What is the phenotypic result of the following cross:
Tt x Tt?
all tall
3 tall: 1 short
2 tall: 2 short
1 tall: 3 short
15. Which term means the genetic make-up of an organism for a certain trait?
phenotype
homozygous
heterozygous
genotype
16. Which of the following traits is not polygenic for humans?
height
skin color
earlobe attachment
hair color
17. What is the genotype of an organism that is a carrier for any autosomal recessive trait?
BB
Bb
bb
18. Huntington's disease is an example of a
polygenic trait
dihybrid cross
autosomal dominant trait
autosomal recessive trait
19. When dihybrid crosses are used
more than one trait is involved
an organism is heterozygous for a trait
one organism is dominant and the other is recessive
a gamete does not go through meiosis
20. Which of the following is an autosomal recessive trait?
dwarfism
albinism
Huntington's disease
skin color
Multiple Choice
1. The result of one human cell after meiosis is
two identical cells
four cells, each with half the number of chromosomes as the parent
four cells, each with forty-four autosomes and two sex chromosomes
one cell with an extra twenty-first chromosome
2. A gamete is defined as
a sex cell
having forty-four autosomes and two sex chromosomes
a normal body cell
chromosomal separation in mitosis
3. During metaphase I of meiosis I
the chromosomes line up single file in the center of the cell
chromosomes pull apart
DNA replicates
chromosomes line up across from their homologue
4. What organisms did Gregor Mendel do his experiments on?
rabbits
fruit flies
pea plants
mice
5. A trait that is not expressed when paired with a dominant allele is the definition of
recessive
dominant
heterozygote
homozygote
6. Describe the following genotype: Aa
homozygous recessive
dominant, recessive
heterozygous
homozygous dominant
7. The physical expression of a gene is the definition of
dominant
recessive
genotype
phenotype
8. In the trait for pea shape, round is dominant over wrinkled. What are the genotype possibilities and ratio for the following cross: Rr x Rr?
3 round: 1 wrinkled
1 RR: 2 Rr: 1 rr
2 Rr: 2 rr
4 Rr = 4 round
9. The heterozygous individual for an autosomal dominant trait
is a carrier
does not have the disorder
has the disorder
is immune to the disorder
10. The heterozygote of red/white flower color which was co-dominant would be
white
red and white
red
pink
11. The heterozygote of red/white flower color which was incompletely dominant would be
white
red and white
red
pink
12. A characteristic that is derived from many genes is called
a polygenic trait
co-dominant
incompletely dominant
multiple alleles
13. Which of the following traits cannot be studied using normal dominance in humans?
eye position
earlobe shape
dimples
height
tongue rolling
14. Tall is dominant over short for plant height. What is the phenotypic result of the following cross:
Tt x Tt?
all tall
3 tall: 1 short
2 tall: 2 short
1 tall: 3 short
15. Which term means the genetic make-up of an organism for a certain trait?
phenotype
homozygous
heterozygous
genotype
16. Which of the following traits is not polygenic for humans?
height
skin color
earlobe attachment
hair color
17. What is the genotype of an organism that is a carrier for any autosomal recessive trait?
BB
Bb
bb
18. Huntington's disease is an example of a
polygenic trait
dihybrid cross
autosomal dominant trait
autosomal recessive trait
19. When dihybrid crosses are used
more than one trait is involved
an organism is heterozygous for a trait
one organism is dominant and the other is recessive
a gamete does not go through meiosis
20. Which of the following is an autosomal recessive trait?
dwarfism
albinism
Huntington's disease
skin color