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Genetics Review. Honors Bio 2011. Which parents would you expect to give only one phenotype?. AaBb x aabb AaBb x AABB AaBb x AaBb AaBb x AAbb. Which parents would you expect to give a 9:3:3:1 ratio of phenotypes?. AaBb x aabb AaBb x AABB AaBb x AaBb AaBb x AAbb.

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genetics review

Genetics Review

Honors Bio 2011

which parents would you expect to give only one phenotype
Which parents would you expect to give only one phenotype?
  • AaBb x aabb
  • AaBb x AABB
  • AaBb x AaBb
  • AaBb x AAbb
which parents would you expect to give a 9 3 3 1 ratio of phenotypes
Which parents would you expect to give a 9:3:3:1 ratio of phenotypes?
  • AaBb x aabb
  • AaBb x AABB
  • AaBb x AaBb
  • AaBb x AAbb
which parents would you expect to give a 1 1 1 1 ratio of phenotypes
Which parents would you expect to give a 1:1:1:1 ratio of phenotypes?
  • AaBb x aabb
  • AaBb x AABB
  • AaBb x AaBb
  • AaBb x AAbb
which parents would you expect to give only two phenotypes 50 each
Which parents would you expect to give only two phenotypes (50 % each)?
  • AaBb x aabb
  • AaBb x AABB
  • AaBb x AaBb
  • AaBb x AAbb
which of the following statements are true about sex linked traits
Which of the following statements are true about sex-linked traits?
  • Since they are on the X chromosome, they are only expressed in females.
  • Since they are on the X chromosome, they are only expressed in males.
  • Are more likely to appear in the phenotypes of females.
  • Are more likely to appear in the phenotypes of males.
  • More than one answer is correct
slide7

In garden peas, yellow seed color is dominant over green. A cross between a homozygous yellow plant and a homozygous green plant yields 25 plants. If an F1 cross were performed and 40 plants were produced, how many of the F2 plants would you expect to be yellow?

  • 10
  • 12.5
  • 20
  • 25
  • 30
  • 40
slide8

A

B

Regions marked A and B are genes. “A” results in the production of purple flowers. “B” results in the production of white flowers. Which term best describes these different flower color genes?

  • Homozygous
  • Dominant
  • Alleles
  • Recessive
based on this punnett square what percentage of offspring would be homozygous
Based on this Punnett square, what percentage of offspring would be homozygous?
  • 25%
  • 50%
  • 75%
  • 100%

B B

B

b

slide10

Cattle have red, roan, & white coat colors. When a red bull and white cow mate, a roan color, which is a “mixture” of red & white, is produced. What is this an example of?

  • Codominance
  • Sex-linked genes
  • Autosomal recessive traits
  • Pedigrees
slide11

A cross is made between two parents with the genotypes AaBB and aabb. If there are 32 offspring, how many of them would be expected to be heterozygous for both characteristics?

  • 32
  • 24
  • 16
  • 8
slide12

Below is a pedigree showing red-green color-blindness, a recessive sex-linked trait in a family. What is the genotype of the individual indicated by the arrow?

  • XHXh
  • Xh Y
  • XH Y
  • XhXh
slide13

In toucans, yellow beak color (Y) is dominant over green beak color and long feathers (L) are dominant over short. A male toucan with a green beak and long feathers mates with a female with a yellow beak and long feathers. They have offspring with green beaks and short feathers. What are the genotypes of the parents?

  • yyLl x YyLl
  • YyLl x YyLl
  • yyll x YYLL
  • Yyll x yyLL
slide14

If the person that is the arrow is pointing to marries a female who is homozygous dominant, what is the possibility that they will have a daughter that carries the red-green colorblindness gene?

  • 0%
  • 25%
  • 50%
  • 100%
slide15

A man with a blood type A marries a woman with blood type B. Their first child has type O blood. What is the possibility that they could have another child with blood type O?

  • 0%
  • 25%
  • 50%
  • 75%
  • 100%
slide16

In roses, red color is dominant over yellow color. A cross between a homozygous red rose and a homozygous yellow rose yields 80 heterozygous roses. A cross between two of these heterozygous roses yields 160 F2 roses. How many of these F2 roses are expected to be red?

  • 40
  • 80
  • 120
  • 160
slide17
When a blue sea sponge mates with yellow sea sponge, a beautiful shade of green sea sponge is produced. What is this an example of?
  • Codominance
  • Dihybrid crosses
  • Inbreeding
  • Incomplete dominance
based on this punnett square what percentage of offspring would express the recessive trait
Based on this Punnett square, what percentage of offspring would express the recessive trait?
  • 25%
  • 50%
  • 75%
  • 100%

B b

B

b

slide19

In spiders eight legs is due to a dominant allele (E). Hairy bodies on spiders are due to another dominant allele (H). If a male who has both conditions (EeHh) mates with a female with both (EeHh), what are the chances of an offspring having only one of the two dominant traits?

  • 1/16
  • 3/16
  • 6/16
  • 9/16
  • 16/16