WorksheetsGenetics 2 test
Total questions: 15
Worksheet time: 27mins
If a corn plant has a genotype of Ttyy, what are the possible genetic combinations that could be present in a single grain of pollen from this plant?
Ty, ty
TY, ty
TY, Ty, ty
Ty, ty, tY, TY
BbSs (male) bbSS (female)
Which one of the following choices is true of the phenotype of offspring from these parents?
All offspring will have black fur.
All offspring will have white fur.
All offspring will have long-haired fur.
All offspring will have short-haired fur.
For these two genes, what is the maximum number of different allele combinations that can be formed normally in gametes produced from this cell?
2
4
6
8
The diagram below represents a cell. The letters in the diagram represent alleles for two different genetic traits. According to Mendel’s law of independent assortment, which of the following shows all of the allele combinations expected in gametes produced by the cell?
TtGg
TT, tt, GG, gg
TG TG tg tg
TG tG Tg tg
Tt Tt Gg Gg
A couple has three children, all of whom have brown eyes and blond hair. Both parents are homozygous for brown eyes (BB) but one is a blond (rr) and the other is a redhead (Rr). What is the probability that their next child will be a brown-eyed redhead?
0/16
1/16
4/16
8/16
A red flower crosses with a white flower to produce a splotchy red and white flower. Which best represents the genotype of the splotchy offspring?
RR
Rr
RW
rW
Which of the following may result in offspring displaying a blended phenotype?
A red flowering co-dominant plant crossed with a red flowering co-dominant plant
A red flowering incompletely dominant plant crossed with a red flowering incompletely dominant plant
A red flowering co-dominant plant crossed with a white flowering co-dominant plant
A red flowering incompletely dominant plant crossed with a white flowering incompletely dominant plant
This diagram represents a what?
Karyotype
Phylogenetic Tree
Pedigree
Monohybrid Cross
Which represents a female in the diagram?
Square
Circle
Shaded Figures
Gender is not represented
If the diagram is referring to a recessive condition, what may represent the genotype of individual #5?
AA
Aa
aa
not enough information
If the diagram is referring to a recessive condition, what may represent the genotype of individual #11
AA
Aa
aa
not enough information
A female guinea pig is heterozygous for both fur color and coat texture is crossed with a male that has light fur color and is heterozygous for coat texture.
What are the possible allele combinations from the father?
dR and dr
DR, dr, dR, and Dr
DR and dr
DR, Dr, and dr
A female guinea pig is heterozygous for both fur color and coat texture is crossed with a male that has light fur color and is heterozygous for coat texture.
What are the possible allele combinations from the Mother?
dR and dr
DR, dr, dR, and Dr
DR and dr
DR, Dr, and dr
Why are scientists warning that exclusively growing this mutant type by asexual reproduction presents a serious disadvantage?
The loss of an adequate Cavendish banana seed supply could result in extinction of this variety.
The changes in characteristics from a parent plant to a clone will produce inconsistent plants that are less healthy.
The lack of genetic variability among clones puts the whole species at increased risk of extinction through a catastrophic disease or pest.
The increasing number of homologous sets of chromosomes with each successive generation of clones will eventually result in widespread death of banana plants.
Growers on large banana plantations that supply food commercially have chosen to limit their plantings exclusively to Cavendish banana plants. What advantage is likely cited by the growers for continued planting of these asexually produced crops year after year?
Seedless cloned plants are not damaged by disease and pest organisms.
Successive generations of clones produce larger bananas and healthier plants.
The cloned banana plants rapidly adapt to extreme environmental changes due to their limited genetic
variation.
The bananas produced maintain consistent characteristics in quality, taste, and appearance from one crop of clones to the next.
