Words In a Sentence
Inherited trait, Acquired trait.
An inherited trait is passed down from parent to offspring while an acquired trait is obtained during one's lifetime.
A hydra buds from its parent organism. Which of the following statements is true?
A. the bud has half the amount of chromosomes as the parent
B. the bud has some of the genes from the parent
C. the bud's genetic material is identical to the parent organism
D. all of the above
C
Brown eyes is dominant to blue. Use a Punnett square to show how it would be possible for two parents with brown eyes to have an offspring with blue eyes.
Bb x Bb
What happens if a person receives one dominant allele and one recessive allele?
A. the dominant allele deletes the recessive.
B. both show up in the phenotype.
C. the dominant allele is hidden.
D. the dominant allele masks the recessive.
D
Was the blood disorder in the blue people of Kentucky passed down through a dominant or recessive allele?
Recessive
Genotype, Phenotype.
Genotype is the genetic makeup, given by letters or a descriptive word-homozygous or heterozygous. Phenotype is the physical manifestation of a trait.
A flatworm creates new offspring through fragmentation while a clownfish lays eggs. Which of the following will result in more genetic variation? Why?
Clownfish, sexual reproduction.
In pea plants, green is dominant to yellow. A farmer mass produces 412 pea plants. 344 of these offspring end up being green while 68 are yellow. What were the most likely genotypes of the parents that were crossed?
Gg x Gg
Explain the difference between having a homozygous vs. a heterozygous genotype.
Homozygous is two of the same allele while heterozygous is two different.
Why did we use cheerios and fruit loops to explain the different ways that organisms reproduce?
Cheerios all look the same- prone to being wiped out similar to asexual. Fruit loops have a variety of traits and were more resilient- similar to sexual.
Trait, Genes, DNA
How does the TOTAL number of chromosomes passed down compare in sexual and asexual reproduction?
A. they are the same
B. in asexual reproduction, half the number of chromosomes get passed down.
C. in asexual reproduction, double the number of chromosomes get passed down.
A
Having dimples is dominant to not having dimples. A parent who is homozygous for having dimples marries someone who also has dimples but is heterozygous. If they have four children, how many will be expected to have dimples?
4
Define the words purebred and hybrid.
Purebred- two of the same allele (homozygous)
Hybrid- two different alleles (heterozygous)
BB:
OO:
AO:
AB:
B
O
A
AB
Heredity, Genetics.
Heredity explains how traits are passed down from parent to offspring. Genetics is the study of heredity.
List four types of asexual reproduction.
binary fission, budding, fragmentation, spores, vegetative propagation.
In Christmas trees, long needles are dominant to short. A Christmas tree with short needles is crossed with a tree that is heterozygous. List all of the possible genotypes and phenotypes.
Ss, ss. Long, short.
What is the difference between co-dominance and incomplete dominance? Explain how a red and white flower that exhibits co-dominance will look different than a red and white flower that shows incomplete.
Co-dominance both show up in the phenotype, incomplete is somewhere in the middle.
Explain how even though you and your siblings share the same parents, you have many different traits?
You received different combinations of genetic material.
Cell, organelle, nucleus, chromosome, DNA, gene, trait, eye color.
Compare and contrast asexual and sexual reproduction. List how many parents are required, one organism that uses each type, and an advantage/disadvantage of each.
Asexual: 1, fungus, happens quickly less energy, less variation.
Sexual: 2, frog, more time and energy but more variation.
In mice, gray fur is dominant to white fur. Both parents are GRAY. The parents have 10 offspring and 5 out of 10 have the RECESSIVE white fur while 5 have gray. Explain how this is possible. What were the parents genotypes?
The parents must both be heterozygous, Gg. Even though there was a 25% chance, the split ended up being 50-50.
Explain the difference between natural selection and selective breeding.
Selective breeding- humans intervene. Natural selection occurs naturally where those who are best adapted will survive and pass on their traits.
A couple is consulting a geneticist to decide if they should have children. The mother has a recessive genetic disorder, cystic fibrosis. Through further investigation you discover the father is homozygous dominant. What percentage of their children will likely have cystic fibrosis?
0%