In a breeding experiment with yellow and green true-breeding parents, Mendel took yellow seeds from his F2 generation, planted them, and self-pollinated the flowers to produce an F3 generation. He saw that some produced all yellow seeds, and some
produced a mix of yellow and green seeds. How can these results be explained?
What will be an ideal response?
There were two kinds of yellow plants in the F2 generation. One kind was homozygous dominant for seed color, and the other kind was heterozygous.
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Which of the following types of cells is matched with the wrong stem cell category?
A. embryonic stem cells: pluripotent B. embryonic germ cells: pluripotent C. hematopoietic stem cells: multipotent D. myeloid cell: unipotent E. zygote: totipotent
________ fish are those that live most of their lives in marine environments and return to freshwater to spawn
Fill in the blank(s) with correct word
In humans, ________ divide by meiosis to produce eggs and sperm.
A. somatic cells B. gametes C. triploid D. zygotes E. germ-line cells
What condition best describes the endogeneity problem?
A. The distribution of the errors (Ui) is non-normal. B. One of the Xi variables is correlated with the error term (Ui). C. Some variables within Xi are perfectly correlated with other variables in Xi. D. The variance of the errors (Ui) depends on Xi.