Day 8 Biology ELT Extra Credit (SB3 a,b, and c)

The heterozygous condition of sickle cell anemia results in resistance to malaria. If a homozygous normal father and a heterozygous mother have a child, what are the chances of that child being resistant to malaria but not having sickle cell anemia?

• 25%

• 50%

• 75%

• 100%

If meiosis continues in this case and produces gametes, what statement concerning their genetic variability would be MOST accurate?

• Genetic variability would increase because of insertion..

• Genetic variability would increase because of crossing over

• Genetic variability would decrease because of translocation.

• There would be no change in the genetic variability in this case.

Bacteria can reproduce quickly by means of binary fission. Because of this, after binary fission

• the offspring will have traits of both parents.

• there is genetic variation among the offspring.

• all the offspring will be genetically identical.

• none of the offspring will be genetically like the parents.

There are four children in the Smith family. One child has blue eyes and blond hair. The other three children have brown eyes and blond hair. How can you explain this difference in eye color?

• Brown eyes are the inherited trait; blue eyes are a mutation.

• Eye color is an inherited trait; brown eyes are dominant over blue.

• The brown eyed children have spent a lot of time outdoors; it's an environmental change.

• The blue eyed child is younger than the children with brown eyes; their eyes will become brown.

Compare the Venn diagram of sexual reproduction and asexual reproduction in plants. Where in the diagram would you add offspring different from parents?

• A

• B

• C

• D

In rabbits, white fur is a recessive trait. Based on this fact, what statement BEST describes this rabbit's genotype?

• It must have the genotype Bb.

• It is homozygous for fur color.

• It cannot have the genotype bb.

• It is heterozygous for fur color

The picture shows the process of asexual reproduction in hydra. According to the illustration, all offspring are

• genetically varied.

• genetically identical to the parent.

• slightly similar to the parent.

• genetically very different from the parent.

In flies, long wings are a dominant trait, and short wings are a recessive trait. Medium wings are the heterozygous trait. Based on this information, if a homozygous long-winged fly is crossed with another a heterozygous fly, their offspring will have which percentages for long, medium, and short wings? Assume random chromosome segregation.

• 25% long, 75% medium, 0% short

• 50% long, 25% medium, 25% short

• 50% long, 50% medium, 0% short

• 100% medium, 0% long, 0% short

All individuals have two alleles for a given trait. According to Mendel's Law of Segregation, these alleles are passed down one each from both mother and father.

They are passed down through gametes from each parent, which are created by the process known as _________.

• fertilization

• meiosis

• mitosis

• myocin

Consider the genetic cross for absent-mindedness, which is a dominant trait. All of the offspring from this cross will be absent-minded. If two parents that are absent-minded have offspring that are not, what MUST be the genotypes of the parents?

• aa X aa

• Aa X Aa

• Aa X aa

• Aa X AA